Add isobus dissector

Bug: 13772

Change-Id: If7ddb10bfc8a1756e8ed00baaa8a28a7e2840a37
Reviewed-on: https://code.wireshark.org/review/21594
Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>

4 files changed, 6916 insertions, 0 deletions

diff --git a/epan/dissectors/CMakeLists.txt b/epan/dissectors/CMakeLists.txt
index 522a6f4a10..4b8923947c 100644
--- a/epan/dissectors/CMakeLists.txt
+++ b/epan/dissectors/CMakeLists.txt
@@ -787,6 +787,8 @@ set(DISSECTOR_SRC
 	packet-iso15765.c
 	packet-iso7816.c
 	packet-iso8583.c
+	packet-isobus.c
+	packet-isobus-vt.c
 	packet-isup.c
 	packet-itdm.c
 	packet-iua.c
diff --git a/epan/dissectors/Makefile.am b/epan/dissectors/Makefile.am
index b5bc8ab8a6..85f5002208 100644
--- a/epan/dissectors/Makefile.am
+++ b/epan/dissectors/Makefile.am
@@ -808,6 +808,8 @@ DISSECTOR_SRC = \
 	packet-iso15765.c	\
 	packet-iso7816.c	\
 	packet-iso8583.c	\
+	packet-isobus.c		\
+	packet-isobus-vt.c	\
 	packet-isup.c		\
 	packet-itdm.c		\
 	packet-iua.c		\
diff --git a/epan/dissectors/packet-isobus-vt.c b/epan/dissectors/packet-isobus-vt.c
new file mode 100644
index 0000000000..4c63cb320e
--- /dev/null
+++ b/epan/dissectors/packet-isobus-vt.c
@@ -0,0 +1,6040 @@
+/* packet-isobus-vt.c
+ * Routines for ISObus VT dissection (Based on CANOpen Dissector)
+ * Copyright 2016, Jeroen Sack <jsack@lely.com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/prefs.h>
+#include <wsutil/file_util.h>
+
+#define MAX_OBJECT_ID_DB_SIZE 10000
+
+void proto_register_isobus_vt(void);
+void proto_reg_handoff_isobus_vt(void);
+
+static guint8 current_vt_version = 0;
+
+/* Initialize the protocol and registered fields */
+static int proto_vt = -1;
+static int hf_isobus_vt = -1;
+static int hf_isobus_vt_command = -1;
+static int hf_isobus_vt_objectid = -1;
+static int hf_isobus_vt_softkey_keyactcode = -1;
+static int hf_isobus_vt_softkey_objectid = -1;
+static int hf_isobus_vt_softkey_parentobjectid = -1;
+static int hf_isobus_vt_softkey_keynumber = -1;
+static int hf_isobus_vt_button_keyactcode = -1;
+static int hf_isobus_vt_button_objectid = -1;
+static int hf_isobus_vt_button_parentobjectid = -1;
+static int hf_isobus_vt_button_keynumber = -1;
+static int hf_isobus_vt_pointing_xposition = -1;
+static int hf_isobus_vt_pointing_yposition = -1;
+static int hf_isobus_vt_pointing_touchstate = -1;
+static int hf_isobus_vt_vtselectinputobject_objectid = -1;
+static int hf_isobus_vt_vtselectinputobject_selection = -1;
+static int hf_isobus_vt_vtselectinputobject_openforinput = -1;
+static int hf_isobus_vt_vtescmessage_objectid = -1;
+static int hf_isobus_vt_vtescmessage_errorcodes = -1;
+static int hf_isobus_vt_vtchgnumval_objectid = -1;
+static int hf_isobus_vt_vtchgnumval_value = -1;
+static int hf_isobus_vt_vtchgactivemask_maskobjectid = -1;
+static int hf_isobus_vt_vtchgactivemask_errorcodes = -1;
+static int hf_isobus_vt_vtchgactivemask_errorobjectid = -1;
+static int hf_isobus_vt_vtchgactivemask_errorobjectidparent = -1;
+static int hf_isobus_vt_vtchgstrval_objectid = -1;
+static int hf_isobus_vt_vtchgstrval_length = -1;
+static int hf_isobus_vt_vtchgstrval_value = -1;
+static int hf_isobus_vt_vtonuserlayouthideshow_objectid_1 = -1;
+static int hf_isobus_vt_vtonuserlayouthideshow_status_1 = -1;
+static int hf_isobus_vt_vtonuserlayouthideshow_objectid_2 = -1;
+static int hf_isobus_vt_vtonuserlayouthideshow_status_2 = -1;
+static int hf_isobus_vt_vtcontrolaudiosignaltermination_terminationcause = -1;
+static int hf_isobus_vt_endofobjectpool_errorcodes = -1;
+static int hf_isobus_vt_endofobjectpool_faultyobjectid = -1;
+static int hf_isobus_vt_endofobjectpool_faultyparentobjectid = -1;
+static int hf_isobus_vt_endofobjectpool_objectpoolerrorcodes = -1;
+static int hf_isobus_vt_auxiliaryassignmenttype1_sourceaddressauxinputdevice = -1;
+static int hf_isobus_vt_auxiliaryassignmenttype1_auxinputnumber = -1;
+static int hf_isobus_vt_auxiliaryassignmenttype1_objectidauxinputdevice = -1;
+static int hf_isobus_vt_auxiliaryinputtype1status_inputnumber = -1;
+static int hf_isobus_vt_auxiliaryinputtype1status_analyzevalue = -1;
+static int hf_isobus_vt_auxiliaryinputtype1status_numberoftransitions = -1;
+static int hf_isobus_vt_auxiliaryinputtype1status_booleanvalue = -1;
+static int hf_isobus_vt_preferredassignment_numberofinputunits = -1;
+static int hf_isobus_vt_preferredassignment_auxinputunit_name = -1;
+static int hf_isobus_vt_preferredassignment_auxinputunit_modelidentificationcode = -1;
+static int hf_isobus_vt_preferredassignment_auxinputunit_numberofpreferredfunctions = -1;
+static int hf_isobus_vt_preferredassignment_auxinputunit_preferredfunctions_auxfunctionobjectid = -1;
+static int hf_isobus_vt_preferredassignment_auxinputunit_preferredfunctions_auxinputobjectid = -1;
+static int hf_isobus_vt_preferredassignment_errorcodes = -1;
+static int hf_isobus_vt_preferredassignment_faultyauxiliaryfunctionobjectid = -1;
+static int hf_isobus_vt_auxiliaryinputtype2maintenance_modelidentificationcode = -1;
+static int hf_isobus_vt_auxiliaryinputtype2maintenance_status = -1;
+static int hf_isobus_vt_auxiliaryassignmenttype2_name = -1;
+static int hf_isobus_vt_auxiliaryassignmenttype2_flags = -1;
+static int hf_isobus_vt_auxiliaryassignmenttype2_flags_preferredassignment = -1;
+static int hf_isobus_vt_auxiliaryassignmenttype2_flags_auxiliaryfunctiontype = -1;
+static int hf_isobus_vt_auxiliaryassignmenttype2_auxinputobjectid = -1;
+static int hf_isobus_vt_auxiliaryassignmenttype2_auxfunctionobjectid = -1;
+static int hf_isobus_vt_auxiliaryassignmenttype2_errorcodes = -1;
+static int hf_isobus_vt_auxiliaryinputstatustype2enable_auxiliaryinputobjectid = -1;
+static int hf_isobus_vt_auxiliaryinputstatustype2enable_enable = -1;
+static int hf_isobus_vt_auxiliaryinputstatustype2enable_status = -1;
+static int hf_isobus_vt_auxiliaryinputstatustype2enable_errorcodes = -1;
+static int hf_isobus_vt_auxiliaryinputtype2status_auxiliaryinputobjectid = -1;
+static int hf_isobus_vt_auxiliaryinputtype2status_value1 = -1;
+static int hf_isobus_vt_auxiliaryinputtype2status_value2 = -1;
+static int hf_isobus_vt_auxiliaryinputtype2status_operatingstate = -1;
+static int hf_isobus_vt_auxiliaryinputtype2status_operatingstate_learnmodeactive = -1;
+static int hf_isobus_vt_auxiliaryinputtype2status_operatingstate_inputactivatedinlearnmode = -1;
+static int hf_isobus_vt_auxiliarycapabilities_requesttype = -1;
+static int hf_isobus_vt_auxiliarycapabilities_numberofauxiliaryunits = -1;
+static int hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_name = -1;
+static int hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_numberofdifferentsets = -1;
+static int hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_set_numberofinstances = -1;
+static int hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_set_functionattribute = -1;
+static int hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_set_assignedattribute = -1;
+static int hf_isobus_vt_esc_objectid = -1;
+static int hf_isobus_vt_esc_errorcodes = -1;
+static int hf_isobus_vt_hideshowobj_objectid = -1;
+static int hf_isobus_vt_hideshowobj_action = -1;
+static int hf_isobus_vt_hideshowobj_errorcodes = -1;
+static int hf_isobus_vt_enabledisableobj_objectid = -1;
+static int hf_isobus_vt_enabledisableobj_enabledisable = -1;
+static int hf_isobus_vt_enabledisableobj_errorcodes = -1;
+static int hf_isobus_vt_selectinputobject_objectid = -1;
+static int hf_isobus_vt_selectinputobject_option = -1;
+static int hf_isobus_vt_selectinputobject_response = -1;
+static int hf_isobus_vt_selectinputobject_errorcodes = -1;
+static int hf_isobus_vt_controlaudiosignal_activations = -1;
+static int hf_isobus_vt_controlaudiosignal_frequency = -1;
+static int hf_isobus_vt_controlaudiosignal_ontime = -1;
+static int hf_isobus_vt_controlaudiosignal_offtime = -1;
+static int hf_isobus_vt_controlaudiosignal_errorcodes = -1;
+static int hf_isobus_vt_setaudiovolume_volume = -1;
+static int hf_isobus_vt_setaudiovolume_errorcodes = -1;
+static int hf_isobus_vt_changechildlocation_parentobjectid = -1;
+static int hf_isobus_vt_changechildlocation_objectid = -1;
+static int hf_isobus_vt_changechildlocation_relativexpos = -1;
+static int hf_isobus_vt_changechildlocation_relativeypos = -1;
+static int hf_isobus_vt_changechildlocation_errorcodes = -1;
+static int hf_isobus_vt_changesize_objectid = -1;
+static int hf_isobus_vt_changesize_newwidth = -1;
+static int hf_isobus_vt_changesize_newheight = -1;
+static int hf_isobus_vt_changesize_errorcodes = -1;
+static int hf_isobus_vt_changebackgroundcolour_objectid = -1;
+static int hf_isobus_vt_changebackgroundcolour_colour = -1;
+static int hf_isobus_vt_changebackgroundcolour_errorcodes = -1;
+static int hf_isobus_vt_chgnumval_objectid = -1;
+static int hf_isobus_vt_chgnumval_errorcodes = -1;
+static int hf_isobus_vt_chgnumval_value = -1;
+static int hf_isobus_vt_changeendpoint_objectid = -1;
+static int hf_isobus_vt_changeendpoint_width = -1;
+static int hf_isobus_vt_changeendpoint_height = -1;
+static int hf_isobus_vt_changeendpoint_linedirection = -1;
+static int hf_isobus_vt_changefontattributes_objectid = -1;
+static int hf_isobus_vt_changefontattributes_fontcolour = -1;
+static int hf_isobus_vt_changefontattributes_fontsize = -1;
+static int hf_isobus_vt_changefontattributes_fonttype = -1;
+static int hf_isobus_vt_changefontattributes_fontstyle = -1;
+static int hf_isobus_vt_changefontattributes_errorcodes = -1;
+static int hf_isobus_vt_changelineattributes_objectid = -1;
+static int hf_isobus_vt_changelineattributes_linecolour = -1;
+static int hf_isobus_vt_changelineattributes_linewidth = -1;
+static int hf_isobus_vt_changelineattributes_lineart = -1;
+static int hf_isobus_vt_changelineattributes_errorcodes = -1;
+static int hf_isobus_vt_changefillattributes_objectid = -1;
+static int hf_isobus_vt_changefillattributes_filltype = -1;
+static int hf_isobus_vt_changefillattributes_fillcolour = -1;
+static int hf_isobus_vt_changefillattributes_fillpatternobjectid = -1;
+static int hf_isobus_vt_changefillattributes_errorcodes = -1;
+static int hf_isobus_vt_changeactivemask_workingset = -1;
+static int hf_isobus_vt_changeactivemask_newactivemask = -1;
+static int hf_isobus_vt_changeactivemask_errorcodes = -1;
+static int hf_isobus_vt_changesoftkeymask_masktype = -1;
+static int hf_isobus_vt_changesoftkeymask_datamaskobjectid = -1;
+static int hf_isobus_vt_changesoftkeymask_newsoftkeymaskobjectid = -1;
+static int hf_isobus_vt_changesoftkeymask_errorcodes = -1;
+static int hf_isobus_vt_changeattributes_objectid = -1;
+static int hf_isobus_vt_changeattributes_attributeid = -1;
+static int hf_isobus_vt_changeattributes_newvalue = -1;
+static int hf_isobus_vt_changeattributes_errorcodes = -1;
+static int hf_isobus_vt_changepriority_objectid = -1;
+static int hf_isobus_vt_changepriority_newpriority = -1;
+static int hf_isobus_vt_changepriority_errorcodes = -1;
+static int hf_isobus_vt_changelistitem_listobjectid = -1;
+static int hf_isobus_vt_changelistitem_listindex = -1;
+static int hf_isobus_vt_changelistitem_newobjectid = -1;
+static int hf_isobus_vt_changelistitem_errorcodes = -1;
+static int hf_isobus_vt_deleteobjectpool_errorcodes = -1;
+static int hf_isobus_vt_chgstrval_objectid = -1;
+static int hf_isobus_vt_chgstrval_length = -1;
+static int hf_isobus_vt_chgstrval_errorcodes = -1;
+static int hf_isobus_vt_chgstrval_value = -1;
+static int hf_isobus_vt_changechildposition_parentobjectid = -1;
+static int hf_isobus_vt_changechildposition_objectid = -1;
+static int hf_isobus_vt_changechildposition_xpos = -1;
+static int hf_isobus_vt_changechildposition_ypos = -1;
+static int hf_isobus_vt_changechildposition_errorcodes = -1;
+static int hf_isobus_vt_changeobjectlabel_objectid = -1;
+static int hf_isobus_vt_changeobjectlabel_stringobjectid = -1;
+static int hf_isobus_vt_changeobjectlabel_fonttype = -1;
+static int hf_isobus_vt_changeobjectlabel_graphicobjectid = -1;
+static int hf_isobus_vt_changeobjectlabel_errorcodes = -1;
+static int hf_isobus_vt_changepolygonpoint_objectid = -1;
+static int hf_isobus_vt_changepolygonpoint_pointindex = -1;
+static int hf_isobus_vt_changepolygonpoint_xvalue = -1;
+static int hf_isobus_vt_changepolygonpoint_yvalue = -1;
+static int hf_isobus_vt_changepolygonpoint_errorcodes = -1;
+static int hf_isobus_vt_changepolygonscale_objectid = -1;
+static int hf_isobus_vt_changepolygonscale_newwidth = -1;
+static int hf_isobus_vt_changepolygonscale_newheight = -1;
+static int hf_isobus_vt_changepolygonscale_errorcodes = -1;
+static int hf_isobus_vt_graphicscontext_objectid = -1;
+static int hf_isobus_vt_graphicscontext_subcommandid = -1;
+static int hf_isobus_vt_graphicscontext_setgraphicscursor_xposition = -1;
+static int hf_isobus_vt_graphicscontext_setgraphicscursor_yposition = -1;
+static int hf_isobus_vt_graphicscontext_movegraphicscursor_xoffset = -1;
+static int hf_isobus_vt_graphicscontext_movegraphicscursor_yoffset = -1;
+static int hf_isobus_vt_graphicscontext_setforegroundcolour_colour = -1;
+static int hf_isobus_vt_graphicscontext_setbackgroundcolour_colour = -1;
+static int hf_isobus_vt_graphicscontext_setlineattributesobjectid_objectid = -1;
+static int hf_isobus_vt_graphicscontext_setfillattributesobjectid_objectid = -1;
+static int hf_isobus_vt_graphicscontext_setfontattributesobjectid_objectid = -1;
+static int hf_isobus_vt_graphicscontext_eraserectangle_width = -1;
+static int hf_isobus_vt_graphicscontext_eraserectangle_height = -1;
+static int hf_isobus_vt_graphicscontext_drawpoint_xoffset = -1;
+static int hf_isobus_vt_graphicscontext_drawpoint_yoffset = -1;
+static int hf_isobus_vt_graphicscontext_drawline_xoffset = -1;
+static int hf_isobus_vt_graphicscontext_drawline_yoffset = -1;
+static int hf_isobus_vt_graphicscontext_drawrectangle_width = -1;
+static int hf_isobus_vt_graphicscontext_drawrectangle_height = -1;
+static int hf_isobus_vt_graphicscontext_drawclosedellipse_width = -1;
+static int hf_isobus_vt_graphicscontext_drawclosedellipse_height = -1;
+static int hf_isobus_vt_graphicscontext_drawpolygon_numberofpoints = -1;
+static int hf_isobus_vt_graphicscontext_drawpolygon_point_xoffset = -1;
+static int hf_isobus_vt_graphicscontext_drawpolygon_point_yoffset = -1;
+static int hf_isobus_vt_graphicscontext_drawtext_background = -1;
+static int hf_isobus_vt_graphicscontext_drawtext_numberofbytes = -1;
+static int hf_isobus_vt_graphicscontext_drawtext_textstring = -1;
+static int hf_isobus_vt_graphicscontext_panviewport_viewportx = -1;
+static int hf_isobus_vt_graphicscontext_panviewport_viewporty = -1;
+static int hf_isobus_vt_graphicscontext_zoomviewport_zoomvalue = -1;
+static int hf_isobus_vt_graphicscontext_panandzoomviewport_viewportx = -1;
+static int hf_isobus_vt_graphicscontext_panandzoomviewport_viewporty = -1;
+static int hf_isobus_vt_graphicscontext_panandzoomviewport_zoomvalue = -1;
+static int hf_isobus_vt_graphicscontext_changeviewportsize_newwidth = -1;
+static int hf_isobus_vt_graphicscontext_changeviewportsize_newheight = -1;
+static int hf_isobus_vt_graphicscontext_drawvtobject_objectid = -1;
+static int hf_isobus_vt_graphicscontext_copycanvastopicturegraphic_objectidpicturegraphic = -1;
+static int hf_isobus_vt_graphicscontext_copyviewporttopicturegraphic_objectidpicturegraphic = -1;
+static int hf_isobus_vt_getattributevalue_objectid = -1;
+static int hf_isobus_vt_getattributevalue_attributeid = -1;
+static int hf_isobus_vt_getattributevalue_value = -1;
+static int hf_isobus_vt_getattributevalue_errorcodes = -1;
+static int hf_isobus_vt_selectcolourmap_objectid = -1;
+static int hf_isobus_vt_selectcolourmap_errorcodes = -1;
+static int hf_isobus_vt_executeextendedmacro_objectid = -1;
+static int hf_isobus_vt_executeextendedmacro_errorcodes = -1;
+static int hf_isobus_vt_lockunlockmask_command = -1;
+static int hf_isobus_vt_lockunlockmask_objectid = -1;
+static int hf_isobus_vt_lockunlockmask_locktimeout = -1;
+static int hf_isobus_vt_lockunlockmask_errorcodes = -1;
+static int hf_isobus_vt_executemacro_objectid = -1;
+static int hf_isobus_vt_executemacro_errorcodes = -1;
+static int hf_isobus_vt_getmemory_memoryrequired = -1;
+static int hf_isobus_vt_getmemory_vtversion = -1;
+static int hf_isobus_vt_getmemory_status = -1;
+static int hf_isobus_vt_getsupportedwidechars_codeplane = -1;
+static int hf_isobus_vt_getsupportedwidechars_firstwidechar = -1;
+static int hf_isobus_vt_getsupportedwidechars_lastwidechar = -1;
+static int hf_isobus_vt_getsupportedwidechars_errorcodes = -1;
+static int hf_isobus_vt_getsupportedwidechars_numberofranges = -1;
+static int hf_isobus_vt_getsupportedwidechars_firstavailablewidechar = -1;
+static int hf_isobus_vt_getsupportedwidechars_lastavailablewidechar = -1;
+static int hf_isobus_vt_getnumberofsoftkeys_navigationsoftkeys = -1;
+static int hf_isobus_vt_getnumberofsoftkeys_xdots = -1;
+static int hf_isobus_vt_getnumberofsoftkeys_ydots = -1;
+static int hf_isobus_vt_getnumberofsoftkeys_virtualsoftkeys = -1;
+static int hf_isobus_vt_getnumberofsoftkeys_physicalsoftkeys = -1;
+static int hf_isobus_vt_gettextfontdata_smallfontsizes = -1;
+static int hf_isobus_vt_gettextfontdata_smallfontsizes_font8x8 = -1;
+static int hf_isobus_vt_gettextfontdata_smallfontsizes_font8x12 = -1;
+static int hf_isobus_vt_gettextfontdata_smallfontsizes_font12x16 = -1;
+static int hf_isobus_vt_gettextfontdata_smallfontsizes_font16x16 = -1;
+static int hf_isobus_vt_gettextfontdata_smallfontsizes_font16x24 = -1;
+static int hf_isobus_vt_gettextfontdata_smallfontsizes_font24x32 = -1;
+static int hf_isobus_vt_gettextfontdata_smallfontsizes_font32x32 = -1;
+static int hf_isobus_vt_gettextfontdata_largefontsizes = -1;
+static int hf_isobus_vt_gettextfontdata_largefontsizes_font32x48 = -1;
+static int hf_isobus_vt_gettextfontdata_largefontsizes_font48x64 = -1;
+static int hf_isobus_vt_gettextfontdata_largefontsizes_font64x64 = -1;
+static int hf_isobus_vt_gettextfontdata_largefontsizes_font64x96 = -1;
+static int hf_isobus_vt_gettextfontdata_largefontsizes_font96x128 = -1;
+static int hf_isobus_vt_gettextfontdata_largefontsizes_font128x128 = -1;
+static int hf_isobus_vt_gettextfontdata_largefontsizes_font128x192 = -1;
+static int hf_isobus_vt_gettextfontdata_typeattributes = -1;
+static int hf_isobus_vt_gettextfontdata_typeattributes_boldtext = -1;
+static int hf_isobus_vt_gettextfontdata_typeattributes_crossedouttext = -1;
+static int hf_isobus_vt_gettextfontdata_typeattributes_underlinedtext = -1;
+static int hf_isobus_vt_gettextfontdata_typeattributes_italicstext = -1;
+static int hf_isobus_vt_gettextfontdata_typeattributes_invertedtext = -1;
+static int hf_isobus_vt_gettextfontdata_typeattributes_flashinverted = -1;
+static int hf_isobus_vt_gettextfontdata_typeattributes_flashhidden = -1;
+static int hf_isobus_vt_gettextfontdata_typeattributes_proportionalfontrendering = -1;
+static int hf_isobus_vt_getwindowmaskdata_backgroundcolourdatamask = -1;
+static int hf_isobus_vt_getwindowmaskdata_backgroundcoloursoftkeymask = -1;
+static int hf_isobus_vt_getsupportedobjects_numberofbytes = -1;
+static int hf_isobus_vt_getsupportedobjects_objecttype = -1;
+static int hf_isobus_vt_gethardware_boottime = -1;
+static int hf_isobus_vt_gethardware_graphictype = -1;
+static int hf_isobus_vt_gethardware_hardware = -1;
+static int hf_isobus_vt_gethardware_hardware_touchscreen = -1;
+static int hf_isobus_vt_gethardware_hardware_pointingdevice = -1;
+static int hf_isobus_vt_gethardware_hardware_multifreqaudiooutput = -1;
+static int hf_isobus_vt_gethardware_hardware_adjustvolumeaudiooutput = -1;
+static int hf_isobus_vt_gethardware_hardware_simultaneousactivationphysicalsoftkeys = -1;
+static int hf_isobus_vt_gethardware_hardware_simultaneousactivationbuttons = -1;
+static int hf_isobus_vt_gethardware_hardware_dragoperation = -1;
+static int hf_isobus_vt_gethardware_hardware_intermediatecoordinatesdrag = -1;
+static int hf_isobus_vt_gethardware_xpixels = -1;
+static int hf_isobus_vt_gethardware_ypixels = -1;
+static int hf_isobus_vt_storeversion_versionlabel = -1;
+static int hf_isobus_vt_storeversion_errorcodes = -1;
+static int hf_isobus_vt_loadversion_versionlabel = -1;
+static int hf_isobus_vt_loadversion_errorcodes = -1;
+static int hf_isobus_vt_deleteversion_versionlabel = -1;
+static int hf_isobus_vt_deleteversion_errorcodes = -1;
+static int hf_isobus_vt_extendedgetversions_numberofversions = -1;
+static int hf_isobus_vt_extendedgetversions_versionlabel = -1;
+static int hf_isobus_vt_extendedstoreversion_versionlabel = -1;
+static int hf_isobus_vt_extendedstoreversion_errorcodes = -1;
+static int hf_isobus_vt_extendedloadversion_versionlabel = -1;
+static int hf_isobus_vt_extendedloadversion_errorcodes = -1;
+static int hf_isobus_vt_extendeddeleteversion_versionlabel = -1;
+static int hf_isobus_vt_extendeddeleteversion_errorcodes = -1;
+static int hf_isobus_vt_getversions_numberofversions = -1;
+static int hf_isobus_vt_getversions_versionlabel = -1;
+static int hf_isobus_vt_unsupportedvtfunction_unsupportedvtfunction = -1;
+static int hf_isobus_vt_vtstatus_workingsetmaster = -1;
+static int hf_isobus_vt_vtstatus_objectiddatamask = -1;
+static int hf_isobus_vt_vtstatus_objectidsoftkeymask = -1;
+static int hf_isobus_vt_vtstatus_vtbusycodes = -1;
+static int hf_isobus_vt_vtstatus_vtbusycodes_updatingvisiblemask = -1;
+static int hf_isobus_vt_vtstatus_vtbusycodes_savingdata = -1;
+static int hf_isobus_vt_vtstatus_vtbusycodes_executingcommand = -1;
+static int hf_isobus_vt_vtstatus_vtbusycodes_executingmacro = -1;
+static int hf_isobus_vt_vtstatus_vtbusycodes_parsingobjectpool = -1;
+static int hf_isobus_vt_vtstatus_vtbusycodes_auxcontrolsactive = -1;
+static int hf_isobus_vt_vtstatus_vtbusycodes_outofmemory = -1;
+static int hf_isobus_vt_vtstatus_vtfunctioncodes = -1;
+static int hf_isobus_vt_wrksetmain_bitmask = -1;
+static int hf_isobus_vt_wrksetmain_version = -1;
+
+
+#define VT_SOFT_KEY_ACTIVATION                  0
+#define VT_BUTTON_ACTIVATION                    1
+#define VT_POINTING_EVENT                       2
+#define VT_VT_SELECT_INPUT_OBJECT               3
+#define VT_VT_ESC_MESSAGE                       4
+#define VT_VT_CHANGE_NUMERIC_VALUE              5
+#define VT_VT_CHANGE_ACTIVE_MASK                6
+#define VT_VT_CHANGE_SOFT_KEY_MASK              7
+#define VT_VT_CHANGE_STRING_VALUE               8
+#define VT_VT_ON_USER_LAYOUT_HIDE_SHOW          9
+#define VT_VT_CONTROL_AUDIO_SIGNAL_TERMINATION  10
+#define VT_OBJECT_POOL_TRANSFER                 17
+#define VT_END_OF_OBJECT_POOL                   18
+#define VT_AUXILIARY_ASSIGNMENT_TYPE_1          32
+#define VT_AUXILIARY_INPUT_TYPE_1_STATUS        33
+#define VT_PREFERRED_ASSIGNMENT                 34
+#define VT_AUXILIARY_INPUT_TYPE_2_MAINTENANCE   35
+#define VT_AUXILIARY_ASSIGNMENT_TYPE_2          36
+#define VT_AUXILIARY_INPUT_STATUS_TYPE_2_ENABLE 37
+#define VT_AUXILIARY_INPUT_TYPE_2_STATUS        38
+#define VT_AUXILIARY_CAPABILITIES               39
+#define VT_ESC                                  146
+#define VT_HIDE_SHOW_OBJECT                     160
+#define VT_ENABLE_DISABLE_COMMAND               161
+#define VT_SELECT_INPUT_OBJECT                  162
+#define VT_CONTROL_AUDIO_SIGNAL                 163
+#define VT_SET_AUDIO_VOLUME                     164
+#define VT_CHANGE_CHILD_LOCATION                165
+#define VT_CHANGE_SIZE                          166
+#define VT_CHANGE_BACKGROUND_COLOUR             167
+#define VT_CHANGE_NUMERIC_VALUE                 168
+#define VT_CHANGE_END_POINT                     169
+#define VT_CHANGE_FONT_ATTRIBUTES               170
+#define VT_CHANGE_LINE_ATTRIBUTES               171
+#define VT_CHANGE_FILL_ATTRIBUTES               172
+#define VT_CHANGE_ACTIVE_MASK                   173
+#define VT_CHANGE_SOFT_KEY_MASK                 174
+#define VT_CHANGE_ATTRIBUTES                    175
+#define VT_CHANGE_PRIORITY                      176
+#define VT_CHANGE_LIST_ITEM                     177
+#define VT_DELETE_OBJECT_POOL                   178
+#define VT_CHANGE_STRING_VALUE                  179
+#define VT_CHANGE_CHILD_POSITION                180
+#define VT_CHANGE_OBJECT_LABEL                  181
+#define VT_CHANGE_POLYGON_POINT                 182
+#define VT_CHANGE_POLYGON_SCALE                 183
+#define VT_GRAPHICS_CONTEXT                     184
+#define VT_GET_ATTRIBUTE_VALUE                  185
+#define VT_SELECT_COLOUR_MAP                    186
+#define VT_IDENTIFY_VT                          187
+#define VT_EXECUTE_EXTENDED_MACRO               188
+#define VT_LOCK_UNLOCK_MASK                     189
+#define VT_EXECUTE_MACRO                        190
+#define VT_GET_MEMORY                           192
+#define VT_GET_SUPPORTED_WIDECHARS              193
+#define VT_GET_NUMBER_OF_SOFT_KEYS              194
+#define VT_GET_TEXT_FONT_DATA                   195
+#define VT_GET_WINDOW_MASK_DATA                 196
+#define VT_GET_SUPPORTED_OBJECTS                197
+#define VT_GET_HARDWARE                         199
+#define VT_STORE_VERSION                        208
+#define VT_LOAD_VERSION                         209
+#define VT_DELETE_VERSION                       210
+#define VT_EXTENDED_GET_VERSIONS                211
+#define VT_EXTENDED_STORE_VERSION               212
+#define VT_EXTENDED_LOAD_VERSION                213
+#define VT_EXTENDED_DELETE_VERSION              214
+#define VT_GET_VERSIONS_MESSAGE                 223
+#define VT_GET_VERSIONS_RESPONSE                224
+#define VT_UNSUPPORTED_VT_FUNCTION              253
+#define VT_VT_STATUS                            254
+#define VT_WORKING_SET_MAINTENANCE              255
+
+static const value_string vt_function_code[] = {
+    { VT_SOFT_KEY_ACTIVATION                 , "Soft Key Activation" },
+    { VT_BUTTON_ACTIVATION                   , "Button Activation" },
+    { VT_POINTING_EVENT                      , "Pointing Event" },
+    { VT_VT_SELECT_INPUT_OBJECT              , "VT Select Input Object" },
+    { VT_VT_ESC_MESSAGE                      , "VT ESC message" },
+    { VT_VT_CHANGE_NUMERIC_VALUE             , "VT Change Numeric Value" },
+    { VT_VT_CHANGE_ACTIVE_MASK               , "VT Change Active Mask" },
+    { VT_VT_CHANGE_SOFT_KEY_MASK             , "VT Change Soft Key Mask" },
+    { VT_VT_CHANGE_STRING_VALUE              , "VT Change String Value" },
+    { VT_VT_ON_USER_LAYOUT_HIDE_SHOW         , "VT On User-Layout Hide/Show" },
+    { VT_VT_CONTROL_AUDIO_SIGNAL_TERMINATION , "VT Control Audio Signal Termination" },
+    { VT_OBJECT_POOL_TRANSFER                , "Object pool transfer" },
+    { VT_END_OF_OBJECT_POOL                  , "End of Object Pool" },
+    { VT_AUXILIARY_ASSIGNMENT_TYPE_1         , "Auxiliary Assignment Type 1" },
+    { VT_AUXILIARY_INPUT_TYPE_1_STATUS       , "Auxiliary Input Type 1" },
+    { VT_PREFERRED_ASSIGNMENT                , "Preferred Assignment" },
+    { VT_AUXILIARY_INPUT_TYPE_2_MAINTENANCE  , "Auxiliary Input Type 2 Maintenance" },
+    { VT_AUXILIARY_ASSIGNMENT_TYPE_2         , "Auxiliary Assignment Type 2" },
+    { VT_AUXILIARY_INPUT_STATUS_TYPE_2_ENABLE, "Auxiliary Input Status Type 2 Enable" },
+    { VT_AUXILIARY_INPUT_TYPE_2_STATUS       , "Auxiliary Input Type 2 Status" },
+    { VT_AUXILIARY_CAPABILITIES              , "Auxiliary Capabilities" },
+    { VT_ESC                                 , "ESC" },
+    { VT_HIDE_SHOW_OBJECT                    , "Hide/Show Object" },
+    { VT_ENABLE_DISABLE_COMMAND              , "Enable/Disable Object" },
+    { VT_SELECT_INPUT_OBJECT                 , "Select Input Object" },
+    { VT_CONTROL_AUDIO_SIGNAL                , "Control Audio Signal" },
+    { VT_SET_AUDIO_VOLUME                    , "Set Audio Volume" },
+    { VT_CHANGE_CHILD_LOCATION               , "Change Child Location" },
+    { VT_CHANGE_SIZE                         , "Change Size" },
+    { VT_CHANGE_BACKGROUND_COLOUR            , "Change Background Colour" },
+    { VT_CHANGE_NUMERIC_VALUE                , "Change Numeric Value" },
+    { VT_CHANGE_END_POINT                    , "Change End Point" },
+    { VT_CHANGE_FONT_ATTRIBUTES              , "Change Font Attributes" },
+    { VT_CHANGE_LINE_ATTRIBUTES              , "Change Line Attributes" },
+    { VT_CHANGE_FILL_ATTRIBUTES              , "Change Fill Attributes" },
+    { VT_CHANGE_ACTIVE_MASK                  , "Change Active Mask" },
+    { VT_CHANGE_SOFT_KEY_MASK                , "Change Soft Key Mask" },
+    { VT_CHANGE_ATTRIBUTES                   , "Change Attribute" },
+    { VT_CHANGE_PRIORITY                     , "Change Priority" },
+    { VT_CHANGE_LIST_ITEM                    , "Change List Item" },
+    { VT_DELETE_OBJECT_POOL                  , "Delete Object Pool" },
+    { VT_CHANGE_STRING_VALUE                 , "Change String Value" },
+    { VT_CHANGE_CHILD_POSITION               , "Change Child Position" },
+    { VT_CHANGE_OBJECT_LABEL                 , "Change Object Label" },
+    { VT_CHANGE_POLYGON_POINT                , "Change Polygon Point" },
+    { VT_CHANGE_POLYGON_SCALE                , "Change Polygon Scale" },
+    { VT_GRAPHICS_CONTEXT                    , "Graphics Context" },
+    { VT_GET_ATTRIBUTE_VALUE                 , "Get Attribute Value" },
+    { VT_SELECT_COLOUR_MAP                   , "Select Colour Map" },
+    { VT_IDENTIFY_VT                         , "Identify VT" },
+    { VT_EXECUTE_EXTENDED_MACRO              , "Execute Extended Macro" },
+    { VT_LOCK_UNLOCK_MASK                    , "Lock/Unlock Mask" },
+    { VT_EXECUTE_MACRO                       , "Execute Macro" },
+    { VT_GET_MEMORY                          , "Get Memory" },
+    { VT_GET_SUPPORTED_WIDECHARS             , "Get Supported Widechars" },
+    { VT_GET_NUMBER_OF_SOFT_KEYS             , "Get Number of Soft Keys" },
+    { VT_GET_TEXT_FONT_DATA                  , "Get Text Font Data" },
+    { VT_GET_WINDOW_MASK_DATA                , "Get Window Mask Data" },
+    { VT_GET_SUPPORTED_OBJECTS               , "Get Supported Objects" },
+    { VT_GET_HARDWARE                        , "Get Hardware" },
+    { VT_STORE_VERSION                       , "Store Version" },
+    { VT_LOAD_VERSION                        , "Load Version" },
+    { VT_DELETE_VERSION                      , "Delete Version" },
+    { VT_EXTENDED_GET_VERSIONS               , "Extended Get Versions" },
+    { VT_EXTENDED_STORE_VERSION              , "Extended Store Version" },
+    { VT_EXTENDED_LOAD_VERSION               , "Extended Load Version" },
+    { VT_EXTENDED_DELETE_VERSION             , "Extended Delete Version" },
+    { VT_GET_VERSIONS_MESSAGE                , "Get Versions message" },
+    { VT_GET_VERSIONS_RESPONSE               , "Get Versions response" },
+    { VT_UNSUPPORTED_VT_FUNCTION             , "Unsupported VT Function" },
+    { VT_VT_STATUS                           , "VT Status" },
+    { VT_WORKING_SET_MAINTENANCE             , "Working Set Maintenance" },
+    { 0, NULL }
+};
+static value_string_ext vt_function_code_ext = VALUE_STRING_EXT_INIT(vt_function_code);
+
+#define SET_GRAPHICS_CURSOR              0
+#define MOVE_GRAPHICS_CURSOR             1
+#define SET_FOREGROUND_COLOUR            2
+#define SET_BACKGROUND_COLOUR            3
+#define SET_LINE_ATTRIBUTES_OBJECT_ID    4
+#define SET_FILL_ATTRIBUTES_OBJECT_ID    5
+#define SET_FONT_ATTRIBUTES_OBJECT_ID    6
+#define ERASE_RECTANGLE                  7
+#define DRAW_POINT                       8
+#define DRAW_LINE                        9
+#define DRAW_RECTANGLE                   10
+#define DRAW_CLOSED_ELLIPSE              11
+#define DRAW_POLYGON                     12
+#define DRAW_TEXT                        13
+#define PAN_VIEWPORT                     14
+#define ZOOM_VIEWPORT                    15
+#define PAN_AND_ZOOM_VIEWPORT            16
+#define CHANGE_VIEWPORT_SIZE             17
+#define DRAW_VT_OBJECT                   18
+#define COPY_CANVAS_TO_PICTURE_GRAPHIC   19
+#define COPY_VIEWPORT_TO_PICTURE_GRAPHIC 20
+
+static const value_string graphics_context_sub_command_id[] = {
+    { SET_GRAPHICS_CURSOR              , "Set Graphics Cursor" },
+    { MOVE_GRAPHICS_CURSOR             , "Move Graphics Cursor" },
+    { SET_FOREGROUND_COLOUR            , "Set Foreground Colour" },
+    { SET_BACKGROUND_COLOUR            , "Set Background Colour" },
+    { SET_LINE_ATTRIBUTES_OBJECT_ID    , "Set Line Attributes Object ID" },
+    { SET_FILL_ATTRIBUTES_OBJECT_ID    , "Set Fill Attributes Object ID" },
+    { SET_FONT_ATTRIBUTES_OBJECT_ID    , "Set Font Attributes Object ID" },
+    { ERASE_RECTANGLE                  , "Erase Rectangle" },
+    { DRAW_POINT                       , "Draw Point" },
+    { DRAW_LINE                        , "Draw Line" },
+    { DRAW_RECTANGLE                   , "Draw Rectangle" },
+    { DRAW_CLOSED_ELLIPSE              , "Draw Closed Ellipse" },
+    { DRAW_POLYGON                     , "Draw Polygon" },
+    { DRAW_TEXT                        , "Draw Text" },
+    { PAN_VIEWPORT                     , "Pan Viewport" },
+    { ZOOM_VIEWPORT                    , "Zoom Viewport" },
+    { PAN_AND_ZOOM_VIEWPORT            , "Pan and Zoom Viewport" },
+    { CHANGE_VIEWPORT_SIZE             , "Change Viewport Size" },
+    { DRAW_VT_OBJECT                   , "Draw VT Object" },
+    { COPY_CANVAS_TO_PICTURE_GRAPHIC   , "Copy Canvas to Picture Graphic" },
+    { COPY_VIEWPORT_TO_PICTURE_GRAPHIC , "Copy Viewport to Picture Graphic" },
+    { 0, NULL }
+};
+static value_string_ext graphics_context_sub_command_id_ext = VALUE_STRING_EXT_INIT(graphics_context_sub_command_id);
+
+static const value_string vt_hide_show_action[] = {
+    { 0, "Hide" },
+    { 1, "Show" },
+    { 0, NULL }
+};
+
+static const value_string vt_hide_show_action_info[] = {
+    { 0, "hidden" },
+    { 1, "shown" },
+    { 0, NULL }
+};
+
+static const value_string vt_enable_disable_action[] = {
+    { 0, "Disable" },
+    { 1, "Enable" },
+    { 0, NULL }
+};
+
+static const range_string vt_colours[] = {
+    { 0  , 0  , "Black" },
+    { 1  , 1  , "White" },
+    { 2  , 2  , "Green" },
+    { 3  , 3  , "Teal" },
+    { 4  , 4  , "Maroon" },
+    { 5  , 5  , "Purple" },
+    { 6  , 6  , "Olive" },
+    { 7  , 7  , "Silver" },
+    { 8  , 8  , "Grey" },
+    { 9  , 9  , "Blue" },
+    { 10 , 10 , "Lime" },
+    { 11 , 11 , "Cyan" },
+    { 12 , 12 , "Red" },
+    { 13 , 13 , "Magenta" },
+    { 14 , 14 , "Yellow" },
+    { 15 , 15 , "Navy" },
+    { 16 , 231, "Colour code defined" },
+    { 232, 255, "Proprietary" },
+    { 0  , 0  , NULL }
+};
+
+#define KEY_RELEASED 0
+#define KEY_PRESSED 1
+#define KEY_STILL_PRESSED 2
+#define KEY_PRESS_ABORTED 3
+
+static const value_string key_activation_codes[] = {
+    { KEY_RELEASED, "Key has been released (state change)" },
+    { KEY_PRESSED, "Key has been pressed (state change)" },
+    { KEY_STILL_PRESSED, "Key is still pressed" },
+    { KEY_PRESS_ABORTED, "Key press aborted" },
+    { 0, NULL }
+};
+
+static const value_string key_activation_codes_info_postfix[] = {
+    { KEY_RELEASED, "has been released" },
+    { KEY_PRESSED, "has been pressed" },
+    { KEY_STILL_PRESSED, "is still held" },
+    { KEY_PRESS_ABORTED, "press aborted" },
+    { 0, NULL }
+};
+
+#define BUTTON_RELEASED 0
+#define BUTTON_PRESSED 1
+#define BUTTON_STILL_HELD 2
+#define BUTTON_PRESS_ABORTED 3
+
+static const value_string button_activation_codes[] = {
+    { BUTTON_RELEASED, "Button has been unlatched or released (state change)" },
+    { BUTTON_PRESSED, "Button has been \"pressed\" or latched (state change)" },
+    { BUTTON_STILL_HELD, "Button is still held (latchable buttons do not repeat)" },
+    { BUTTON_PRESS_ABORTED, "Button press aborted" },
+    { 0, NULL }
+};
+
+#define TOUCH_RELEASED 0
+#define TOUCH_PRESSED 1
+#define TOUCH_HELD 2
+
+static const value_string pointing_touch_state[] = {
+    { TOUCH_RELEASED, "Released" },
+    { TOUCH_PRESSED, "Pressed" },
+    { TOUCH_HELD, "Held" },
+    { 0, NULL }
+};
+
+static const value_string pointing_touch_state_info_postfix[] = {
+    { TOUCH_RELEASED, "has been released" },
+    { TOUCH_PRESSED, "has been pressed" },
+    { TOUCH_HELD, "is still held" },
+    { 0, NULL }
+};
+
+static const value_string selection[] = {
+    { 0, "Object is deselected" },
+    { 1, "Object is selected (has focus)" },
+    { 0, NULL }
+};
+
+static const range_string vt_versions[] = {
+    { 0, 2, "Reserved" },
+    { 3, 3, "Compliant with VT Version 3" },
+    { 4, 4, "Compliant with VT Version 4" },
+    { 5, 5, "Compliant with VT Version 5" },
+    { 6, 254, "Reserved" },
+    { 255, 255, "Compliant with VT Version 2" },
+    { 0, 0, NULL }
+};
+
+static const value_string line_direction[] = {
+    { 0, "Top left to bottom right" },
+    { 1, "Bottom left to top right" },
+    { 0, NULL }
+};
+
+#define MASK_UNLOCK 0
+#define MASK_LOCK 1
+
+static const value_string lock_unlock[] = {
+    { MASK_UNLOCK, "Unlock Data Mask or User-Layout Data Mask" },
+    { MASK_LOCK  , "Lock Data Mask or User-Layout Data Mask" },
+    { 0, NULL }
+};
+
+#define ENOUGH_MEMORY 0
+#define NOT_ENOUGH_MEMORY 1
+
+static const value_string memory_status[] = {
+    { ENOUGH_MEMORY    , "There can be enough memory." },
+    { NOT_ENOUGH_MEMORY, "There is not enough memory available. Do not transmit Object Pool." },
+    { 0, NULL }
+};
+
+static const value_string vt_versions_extended[] = {
+    { 0, "Hannover Agritechnica 2001 limited feature set" },
+    { 1, "FDIS Version ISO11783-6:2004(E), (Final Draft International Standard)" },
+    { 2, "IS Version ISO11783-6:2004(E), First Edition, 2004-06-15" },
+    { 3, "IS Version ISO11783-6:2010(E), Second Edition, (ISO11783-6:2004(E) and features specifically noted with version 3 reference)" },
+    { 4, "IS Version ISO11783-6:2010(E), Second Edition, (ISO11783-6:2004(E) and features specifically noted with version 4 reference)" },
+    { 5, "IS Version ISO11783-6:2014(E), Third Edition" },
+    { 0, NULL }
+};
+
+static const range_string vt_object_types[] = {
+    /* Top level objects */
+    { 0,   0,   "Working Set object" },
+    { 1,   1,   "Data Mask object" },
+    { 2,   2,   "Alarm Mask object" },
+    { 3,   3,   "Container object" },
+    { 34,  34,  "Window Mask object" },
+    /* Key objects */
+    { 4,   4,   "Soft Key Mask object" },
+    { 5,   5,   "Key object" },
+    { 6,   6,   "Button object" },
+    { 35,  35,  "Key Group object" },
+    /* Input field objects */
+    { 7,   7,   "Input Boolean object" },
+    { 8,   8,   "Input String object" },
+    { 9,   9,   "Input Number object" },
+    { 10,  10,  "Input List object" },
+    /* Output field objects */
+    { 11,  11,  "Output String object" },
+    { 12,  12,  "Output Number object" },
+    { 37,  37,  "Output List object" },
+    /* Output shape objects */
+    { 13,  13,  "Output Line object" },
+    { 14,  14,  "Output Rectangle object" },
+    { 15,  15,  "Output Ellipse object" },
+    { 16,  16,  "Output Polygon object" },
+    /* Output graphic objects */
+    { 17,  17,  "Output Meter object" },
+    { 18,  18,  "Output Linear Bar Graph object" },
+    { 19,  19,  "Output Arched Bar Graph object" },
+    { 36,  36,  "Graphics Context object" },
+    { 44,  44,  "Animation object" },
+    /* Picture graphic object */
+    { 20,  20,  "Picture Graphic object" },
+    /* Variable objects */
+    { 21,  21,  "Number Variable object" },
+    { 22,  22,  "String Variable object" },
+    /* Attribute Objects */
+    { 23,  23,  "Font Attributes object" },
+    { 24,  24,  "Line Attributes object" },
+    { 25,  25,  "Fill Attributes object" },
+    { 26,  26,  "Input Attributes object" },
+    { 38,  38,  "Extended Input Attributes object" },
+    { 39,  39,  "Colour Map object" },
+    { 40,  40,  "Object Label Reference List object" },
+    /* Pointer objects */
+    { 27,  27,  "Object Pointer object" },
+    { 41,  41,  "External Object Definition object" },
+    { 42,  42,  "External Reference NAME object" },
+    { 43,  43,  "External Object Pointer object" },
+    /* Macro object */
+    { 28,  28,  "Macro object" },
+    /* Auxiliary control */
+    { 29,  29,  "Auxiliary Function Type 1 object" },
+    { 30,  30,  "Auxiliary Input Type 1 object" },
+    { 31,  31,  "Auxiliary Function Type 2 object" },
+    { 32,  32,  "Auxiliary Input Type 2 object" },
+    { 33,  33,  "Auxiliary Control Designator Type 2 Object Pointer" },
+    /* Proprietary Objects */
+    { 240, 254, "Manufacturer Defined Objects" },
+    /* Reserved Objects */
+    { 45,  239, "Reserved" },
+    { 255, 255, "Reserved" },
+    { 0, 0, NULL }
+};
+
+static const value_string graphic_types[] = {
+    { 0, "Monochrome" },
+    { 1, "16 Colour" },
+    { 2, "256 Colour" },
+    { 0, NULL }
+};
+
+static const value_string auxiliary_boolean_value[] = {
+    { 0, "Disabled" },
+    { 1, "Enabled" },
+    { 2, "non-latched Boolean held" },
+    { 0xFF, "Analog" },
+    { 0, NULL }
+};
+
+static const value_string auxiliary_maintenance_status[] = {
+    { 0, "Initializing, pool is not currently available for assignment." },
+    { 1, "Ready, pool has been loaded into the VT and is available for assignments." },
+    { 0, NULL }
+};
+
+static const value_string auxiliary_capabilities_request_type[] = {
+    { 0, "Request capabilities of Auxiliary Input Unit(s)" },
+    { 1, "Request capabilities of Auxiliary Function Unit(s)" },
+    { 0, NULL }
+};
+
+static const value_string auxiliary_assigned_attributes[] = {
+    { 0, "auxiliary input" },
+    { 1, "auxiliary function" },
+    { 2, "Input is assigned" },
+    { 0, NULL }
+};
+
+static const value_string select_input_object_option[] = {
+    { 0xFF, "Set Focus to object referenced by Object ID " },
+    { 0   , "Activate for data-input the object reference by Object ID" },
+    { 0, NULL },
+};
+
+static const value_string select_input_opject_response[] = {
+    { 0, "Object referenced by Object ID is not selected or Object ID is the NULL object" },
+    { 1, "Object referenced by Object ID is Selected" },
+    { 2, "Object referenced by Object ID is Opened for Edit" },
+    { 0, NULL }
+};
+
+static const value_string draw_text_background[] = {
+    { 0, "Opaque" },
+    { 1, "Transparant" },
+    { 0, NULL }
+};
+
+static value_string object_id_strings[MAX_OBJECT_ID_DB_SIZE];
+
+/* Initialize the subtree pointers */
+static gint ett_isobus_vt = -1;
+static gint ett_isobus_vt_vtstatus_busycodes_subtree = -1;
+static gint ett_isobus_vt_getsupportedwidechars_range = -1;
+static gint ett_isobus_vt_gettextfontdata_smallfontsizes = -1;
+static gint ett_isobus_vt_gettextfontdata_largefontsizes = -1;
+static gint ett_isobus_vt_gettextfontdata_typeattributes = -1;
+static gint ett_isobus_vt_gethardware_hardware = -1;
+static gint ett_isobus_vt_preferredassignment_inputunit = -1;
+static gint ett_isobus_vt_preferredassignment_inputunit_preferredfunction = -1;
+static gint ett_isobus_vt_auxiliarycapabilities_inputunit = -1;
+static gint ett_isobus_vt_auxiliarycapabilities_inputunit_set = -1;
+static gint ett_isobus_vt_auxiliaryassignmenttype2_flags = -1;
+static gint ett_isobus_vt_auxiliaryinputtype2status_operatingstate = -1;
+
+static const char *object_id_translation = "";
+
+enum vt_direction
+{
+    vt_to_ecu,
+    ecu_to_vt
+};
+
+static const gchar* get_object_id_string(guint16 object_id)
+{
+    const gchar* translated_string;
+    if(object_id == 0xFFFF)
+    {
+        return "NULL Object ID";
+    }
+
+    translated_string = val_to_str(object_id, object_id_strings, "Object ID 0x%04X");
+    return translated_string;
+}
+
+static int
+dissect_vt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, enum vt_direction direction)
+{
+    int offset = 0;
+    guint32 function_id;
+    proto_item *ti;
+
+    ti = proto_tree_add_item(tree,
+        hf_isobus_vt, tvb, 0, 0, ENC_NA);
+    PROTO_ITEM_SET_HIDDEN(ti);
+
+    proto_tree_add_item_ret_uint(tree,
+        hf_isobus_vt_command, tvb, offset, 1, ENC_LITTLE_ENDIAN, &function_id);
+    offset += 1;
+
+    switch(function_id)
+    {
+    case VT_SOFT_KEY_ACTIVATION:
+    {
+        guint32 key_activation_code, object_id, parent_object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_softkey_keyactcode, tvb, offset, 1, ENC_LITTLE_ENDIAN, &key_activation_code);
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_softkey_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_softkey_parentobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &parent_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item(tree,
+            hf_isobus_vt_softkey_keynumber, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+
+        col_append_fstr(pinfo->cinfo, COL_INFO, "Key %s of parent %s %s",
+            get_object_id_string(object_id), get_object_id_string(parent_object_id),
+            val_to_str(key_activation_code, key_activation_codes_info_postfix, "unknown action"));
+    }
+        break;
+    case VT_BUTTON_ACTIVATION:
+    {
+        guint32 key_activation_code, object_id, parent_object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_button_keyactcode, tvb, offset, 1, ENC_LITTLE_ENDIAN, &key_activation_code);
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_button_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_button_parentobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &parent_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item(tree,
+            hf_isobus_vt_button_keynumber, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+
+        col_append_fstr(pinfo->cinfo, COL_INFO, "Button %s of parent %s %s",
+            get_object_id_string(object_id), get_object_id_string(parent_object_id),
+            val_to_str(key_activation_code, key_activation_codes_info_postfix, "unknown action"));
+    }
+        break;
+    case VT_POINTING_EVENT:
+    {
+        guint32 x_position, y_position, touch_state = 0;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_pointing_xposition, tvb, offset, 2, ENC_LITTLE_ENDIAN, &x_position);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_pointing_yposition, tvb, offset, 2, ENC_LITTLE_ENDIAN, &y_position);
+        offset += 2;
+
+        if(current_vt_version >= 4)
+        {
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_pointing_touchstate, tvb, offset, 1, ENC_LITTLE_ENDIAN, &touch_state);
+        }
+
+        col_append_fstr(pinfo->cinfo, COL_INFO, "Touch at [%d;%d]",
+            x_position, y_position);
+
+        if(current_vt_version >= 4)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, " %s", val_to_str(touch_state, pointing_touch_state_info_postfix, "unknown action"));
+        }
+    }
+        break;
+    case VT_VT_SELECT_INPUT_OBJECT:
+    {
+        guint32 object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtselectinputobject_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item(tree,
+            hf_isobus_vt_vtselectinputobject_selection, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        offset += 1;
+
+        if(current_vt_version >= 4)
+        {
+            proto_tree_add_item(tree,
+                hf_isobus_vt_vtselectinputobject_openforinput, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        }
+
+        col_append_fstr(pinfo->cinfo, COL_INFO, "%s was selected by VT", get_object_id_string(object_id));
+    }
+        break;
+    case VT_VT_ESC_MESSAGE:
+    {
+        guint32 object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtescmessage_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            guint32 error_codes;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_vtescmessage_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "No input field is selected ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "ESC button was pressed while %s was selected", get_object_id_string(object_id));
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "ESC button press was successfully received");
+        }
+    }
+        break;
+    case VT_VT_CHANGE_NUMERIC_VALUE:
+    {
+        guint32 object_id, value;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtchgnumval_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        offset += 1; /* byte 4 is reserved */
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtchgnumval_value, tvb, offset, 4, ENC_LITTLE_ENDIAN, &value);
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "VT Numeric value of %s has changed to 0x%X",
+                get_object_id_string(object_id), value);
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "VT Numeric value of %s should change to 0x%X",
+                get_object_id_string(object_id), value);
+        }
+    }
+        break;
+    case VT_VT_CHANGE_ACTIVE_MASK:
+    {
+        guint32 mask_object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtchgactivemask_maskobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &mask_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            guint32 error_object_id, error_codes;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_vtchgactivemask_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Missing object ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Mask or child object has errors ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+            if (error_codes & 0x20)
+                proto_item_append_text(ti, "Pool being deleted ");
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_vtchgactivemask_errorobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &error_object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_vtchgactivemask_errorobjectidparent, tvb, offset, 2, ENC_LITTLE_ENDIAN, &error_object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "VT Active mask changed to %s",
+                    get_object_id_string(mask_object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "VT Active mask changed to %s because of error in %s",
+                    get_object_id_string(mask_object_id), get_object_id_string(error_object_id));
+            }
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "VT Active mask change to %s acknowledged",
+                get_object_id_string(mask_object_id));
+        }
+    }
+        break;
+    case VT_VT_CHANGE_STRING_VALUE:
+    {
+        if(direction == vt_to_ecu)
+        {
+            guint encoding = ENC_ASCII|ENC_NA;
+            guint32 object_id, str_length;
+            guint16 firstTwoBytesString;
+            const guint8* value;
+            guint bomOffset = 0;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_vtchgstrval_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_vtchgstrval_length, tvb, offset, 1, ENC_LITTLE_ENDIAN, &str_length);
+            offset += 1;
+
+            firstTwoBytesString = tvb_get_letohs(tvb,offset);
+            if(firstTwoBytesString == 0xFEFF)
+            {
+                encoding = ENC_UCS_2;
+                bomOffset = 2;
+            }
+
+            proto_tree_add_item_ret_string(tree,
+                hf_isobus_vt_vtchgstrval_value, tvb, offset + bomOffset, str_length - bomOffset, encoding,
+                wmem_packet_scope(), &value);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "VT String value of %s should change to %s",
+                get_object_id_string(object_id), value);
+        }
+        else
+        {
+            guint32 object_id;
+
+            offset += 2;    /* first two bytes are reserved */
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_chgstrval_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "VT String value change of %s acknowledged",
+                get_object_id_string(object_id));
+        }
+    }
+        break;
+    case VT_VT_ON_USER_LAYOUT_HIDE_SHOW:
+    {
+        guint32 object_id[2], status[2];
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtonuserlayouthideshow_objectid_1, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id[0]);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtonuserlayouthideshow_status_1, tvb, offset, 1, ENC_LITTLE_ENDIAN, &status[0]);
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtonuserlayouthideshow_objectid_2, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id[1]);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtonuserlayouthideshow_status_2, tvb, offset, 1, ENC_LITTLE_ENDIAN, &status[1]);
+
+        col_append_fstr(pinfo->cinfo, COL_INFO, "VT On User-Layout Hide/Show. %s is %s, %s is %s",
+            get_object_id_string(object_id[0]), val_to_str(status[0], vt_hide_show_action_info, "unknown"),
+            get_object_id_string(object_id[1]), val_to_str(status[1], vt_hide_show_action_info, "unknown"));
+    }
+        break;
+    case VT_VT_CONTROL_AUDIO_SIGNAL_TERMINATION:
+    {
+        guint32 termination_cause;
+
+        ti = proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtcontrolaudiosignaltermination_terminationcause, tvb, offset, 1, ENC_LITTLE_ENDIAN, &termination_cause);
+
+        proto_item_append_text(ti, ": ");
+        if (termination_cause & 0x01)
+            proto_item_append_text(ti, "Audio was terminated ");
+
+        if (termination_cause & 0x01)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "VT Control audio signal termination: Audio was terminated");
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "VT Control audio signal termination: Error in message");
+        }
+    }
+        break;
+    case VT_END_OF_OBJECT_POOL:
+    {
+        if(direction == vt_to_ecu)
+        {
+            guint32 error_codes, obj_pool_error_codes;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_endofobjectpool_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "There are errors in the Object Pool ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "VT ran out of memory during transfer ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+            offset += 1;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_endofobjectpool_faultyparentobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_endofobjectpool_faultyobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_endofobjectpool_objectpoolerrorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &obj_pool_error_codes);
+            proto_item_append_text(ti, ": ");
+            if (obj_pool_error_codes & 0x01)
+                proto_item_append_text(ti, "method or Attribute not supported by the VT ");
+            if (obj_pool_error_codes & 0x02)
+                proto_item_append_text(ti, "unknown object reference (missing object) ");
+            if (obj_pool_error_codes & 0x04)
+                proto_item_append_text(ti, "any other error ");
+            if (obj_pool_error_codes & 0x08)
+                proto_item_append_text(ti, "object pool was deleted from volatile memory ");
+
+            if(error_codes & 0x01)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "End of object pool received, object pool contains errors");
+            }
+            else if(error_codes & 0x02)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "End of object pool received, but VT ran out of memory");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "End of object pool received, object pool accepted");
+            }
+        }
+    }
+        break;
+    case VT_AUXILIARY_ASSIGNMENT_TYPE_1:
+    {
+        guint32 source_address, aux_input_number, object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryassignmenttype1_sourceaddressauxinputdevice, tvb, offset, 1, ENC_LITTLE_ENDIAN, &source_address);
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryassignmenttype1_auxinputnumber, tvb, offset, 1, ENC_LITTLE_ENDIAN, &aux_input_number);
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryassignmenttype1_objectidauxinputdevice, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Assign auxiliary input type 1 number %u of device %u to %s",
+                aux_input_number, source_address, get_object_id_string(object_id));
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Auxiliary input type 1 number %u of device %u has been assigned to %s",
+                aux_input_number, source_address, get_object_id_string(object_id));
+        }
+    }
+        break;
+    case VT_AUXILIARY_INPUT_TYPE_1_STATUS:
+    {
+        guint32 input_number, boolean_value, analyze_value;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryinputtype1status_inputnumber, tvb, offset, 1, ENC_LITTLE_ENDIAN, &input_number);
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryinputtype1status_analyzevalue, tvb, offset, 2, ENC_LITTLE_ENDIAN, &analyze_value);
+        offset += 2;
+
+        proto_tree_add_item(tree,
+            hf_isobus_vt_auxiliaryinputtype1status_numberoftransitions, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryinputtype1status_booleanvalue, tvb, offset, 1, ENC_LITTLE_ENDIAN, &boolean_value);
+
+        col_append_fstr(pinfo->cinfo, COL_INFO, "State of input %u is analog %u or digital %s",
+            input_number, analyze_value, val_to_str(boolean_value, auxiliary_boolean_value, "unknown"));
+
+    }
+        break;
+    case VT_PREFERRED_ASSIGNMENT:
+    {
+        if(direction == ecu_to_vt)
+        {
+            guint32 number_of_input_units, i;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_preferredassignment_numberofinputunits, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_input_units);
+            offset += 1;
+
+            for(i = 0; i < number_of_input_units; i++)
+            {
+                proto_item *input_unit_item;
+                proto_tree *input_unit_subtree;
+                guint32 number_of_preferred_functions, j, model_identification_code;
+                guint64 name;
+
+                input_unit_subtree = proto_tree_add_subtree_format(tree, tvb, offset, 0, ett_isobus_vt_preferredassignment_inputunit, &input_unit_item, "Input Unit");
+
+                proto_tree_add_item_ret_uint64(input_unit_subtree,
+                    hf_isobus_vt_preferredassignment_auxinputunit_name, tvb, offset, 8, ENC_LITTLE_ENDIAN, &name);
+                offset += 8;
+
+                proto_tree_add_item_ret_uint(input_unit_subtree,
+                    hf_isobus_vt_preferredassignment_auxinputunit_modelidentificationcode, tvb, offset, 2, ENC_LITTLE_ENDIAN, &model_identification_code);
+                offset += 2;
+
+                proto_tree_add_item_ret_uint(input_unit_subtree,
+                    hf_isobus_vt_preferredassignment_auxinputunit_numberofpreferredfunctions, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_preferred_functions);
+                offset += 1;
+
+                proto_item_set_text(input_unit_item, "Input Unit name 0x%" G_GINT64_MODIFIER "X model identification code %u", name, model_identification_code);
+                proto_item_set_len(input_unit_item, 8 + 2 + 1 + ((2 + 2) * number_of_preferred_functions));
+
+                for(j = 0; j < number_of_preferred_functions; j++)
+                {
+                    proto_item *preferred_function_item;
+                    proto_tree *preferred_function_subtree;
+                    guint32 auxiliary_function_object_id, auxiliary_input_object_id;
+
+                    preferred_function_subtree = proto_tree_add_subtree(input_unit_subtree, tvb, offset, 4,
+                        ett_isobus_vt_preferredassignment_inputunit_preferredfunction, &preferred_function_item, "Input Unit");
+
+                    proto_tree_add_item_ret_uint(preferred_function_subtree,
+                        hf_isobus_vt_preferredassignment_auxinputunit_preferredfunctions_auxfunctionobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &auxiliary_function_object_id);
+                    ti = proto_tree_add_item(tree,
+                        hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+                    PROTO_ITEM_SET_HIDDEN(ti);
+                    offset += 2;
+
+                    proto_tree_add_item_ret_uint(preferred_function_subtree,
+                        hf_isobus_vt_preferredassignment_auxinputunit_preferredfunctions_auxinputobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &auxiliary_input_object_id);
+                    ti = proto_tree_add_item(tree,
+                        hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+                    PROTO_ITEM_SET_HIDDEN(ti);
+                    offset += 2;
+
+                    proto_item_set_text(preferred_function_item, "Auxiliary Function %s connects to Auxiliary Input %s",
+                        get_object_id_string(auxiliary_function_object_id), get_object_id_string(auxiliary_input_object_id));
+                }
+            }
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Create preferred assignment");
+        }
+        else
+        {
+            guint32 error_codes, faulty_auxiliary_function_object_id;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_preferredassignment_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Auxiliary Input Unit(s) not valid ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Function Object ID(s) not valid ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Input Object ID(s) not valid ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Duplicate Object ID of Auxiliary Function ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_preferredassignment_faultyauxiliaryfunctionobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &faulty_auxiliary_function_object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while creating preferred assignment because of %s", get_object_id_string(faulty_auxiliary_function_object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Successfully created preferred assignment");
+            }
+        }
+    }
+        break;
+    case VT_AUXILIARY_INPUT_TYPE_2_MAINTENANCE:
+    {
+        if(direction == ecu_to_vt)
+        {
+            guint32 model_identification_code, status;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_auxiliaryinputtype2maintenance_modelidentificationcode, tvb, offset, 2, ENC_LITTLE_ENDIAN, &model_identification_code);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_auxiliaryinputtype2maintenance_status, tvb, offset, 1, ENC_LITTLE_ENDIAN, &status);
+
+            if(status == 0)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Auxiliary Input Type 2 Maintenance: Model Identification Code %u, Status is Initializing",
+                    model_identification_code);
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Auxiliary Input Type 2 Maintenance: Model Identification Code %u, Status is Ready",
+                    model_identification_code);
+            }
+        }
+    }
+        break;
+    case VT_AUXILIARY_ASSIGNMENT_TYPE_2:
+    {
+        guint32 error_codes, auxiliary_input_object_id = 0, auxiliary_function_object_id;
+        guint64 name = 0;
+
+        if(direction == ecu_to_vt)
+        {
+            proto_tree *flags_subtree;
+
+            proto_tree_add_item_ret_uint64(tree,
+                hf_isobus_vt_auxiliaryassignmenttype2_name, tvb, offset, 8, ENC_LITTLE_ENDIAN, &name);
+            offset += 8;
+
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_auxiliaryassignmenttype2_flags, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            flags_subtree = proto_item_add_subtree(ti, ett_isobus_vt_auxiliaryassignmenttype2_flags);
+            ti = proto_tree_add_item(flags_subtree,
+                hf_isobus_vt_auxiliaryassignmenttype2_flags_preferredassignment, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_GENERATED(ti);
+            ti = proto_tree_add_item(flags_subtree,
+                hf_isobus_vt_auxiliaryassignmenttype2_flags_auxiliaryfunctiontype, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_GENERATED(ti);
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_auxiliaryassignmenttype2_auxinputobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &auxiliary_input_object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+        }
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryassignmenttype2_auxfunctionobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &auxiliary_function_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_auxiliaryassignmenttype2_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "error, assignment not accepted ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "error, this function is already assigned ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Assign %s of name 0x%" G_GINT64_MODIFIER "X to function %s",
+                get_object_id_string(auxiliary_input_object_id), name, get_object_id_string(auxiliary_function_object_id));
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while assigning function %s",
+                    get_object_id_string(auxiliary_function_object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Successfully assigned function %s",
+                    get_object_id_string(auxiliary_function_object_id));
+            }
+        }
+    }
+        break;
+    case VT_AUXILIARY_INPUT_STATUS_TYPE_2_ENABLE:
+    {
+        guint32 enable, status, error_codes, auxiliary_input_object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryinputstatustype2enable_auxiliaryinputobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &auxiliary_input_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == ecu_to_vt)
+        {
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_auxiliaryinputstatustype2enable_enable, tvb, offset, 1, ENC_LITTLE_ENDIAN, &enable);
+        }
+        else
+        {
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_auxiliaryinputstatustype2enable_status, tvb, offset, 1, ENC_LITTLE_ENDIAN, &status);
+            offset += 1;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_auxiliaryinputstatustype2enable_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Auxiliary Input Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            if(enable == 0)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Auxiliary Input %s should be disabled",
+                    get_object_id_string(auxiliary_input_object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Auxiliary Input %s should be enabled",
+                    get_object_id_string(auxiliary_input_object_id));
+            }
+        }
+        else
+        {
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing status for Auxiliary Input %s",
+                    get_object_id_string(auxiliary_input_object_id));
+            }
+            else
+            {
+                if(status == 0)
+                {
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "Status of Auxiliary Input %s was successfully changed to enabled",
+                        get_object_id_string(auxiliary_input_object_id));
+                }
+                else
+                {
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "Status of Auxiliary Input %s was successfully changed to enabled",
+                        get_object_id_string(auxiliary_input_object_id));
+                }
+            }
+        }
+    }
+        break;
+    case VT_AUXILIARY_INPUT_TYPE_2_STATUS:
+    {
+        guint32 auxiliary_input_object_id, value_1, value_2;
+        proto_tree* operating_state_subtree;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryinputtype2status_auxiliaryinputobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &auxiliary_input_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryinputtype2status_value1, tvb, offset, 2, ENC_LITTLE_ENDIAN, &value_1);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_auxiliaryinputtype2status_value2, tvb, offset, 2, ENC_LITTLE_ENDIAN, &value_2);
+        offset += 2;
+
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_auxiliaryinputtype2status_operatingstate, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        operating_state_subtree = proto_item_add_subtree(ti, ett_isobus_vt_auxiliaryinputtype2status_operatingstate);
+        ti = proto_tree_add_item(operating_state_subtree,
+            hf_isobus_vt_auxiliaryinputtype2status_operatingstate_learnmodeactive, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_GENERATED(ti);
+        ti = proto_tree_add_item(operating_state_subtree,
+            hf_isobus_vt_auxiliaryinputtype2status_operatingstate_inputactivatedinlearnmode, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_GENERATED(ti);
+
+        col_append_fstr(pinfo->cinfo, COL_INFO, "State of input %s value 1 = 0x%X value 2 = 0x%X.",
+            get_object_id_string(auxiliary_input_object_id), value_1, value_2);
+    }
+        break;
+    case VT_AUXILIARY_CAPABILITIES:
+    {
+        if(direction == ecu_to_vt)
+        {
+            guint32 request_type;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_auxiliarycapabilities_requesttype, tvb, offset, 1, ENC_LITTLE_ENDIAN, &request_type);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",
+                val_to_str(request_type, auxiliary_capabilities_request_type, "Request capabilities of Unknown"));
+        }
+        else
+        {
+            guint32 number_of_auxiliary_units, i;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_auxiliarycapabilities_numberofauxiliaryunits, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_auxiliary_units);
+            offset += 1;
+
+            for(i = 0; i < number_of_auxiliary_units; i++)
+            {
+                proto_item *input_unit_item;
+                proto_tree *input_unit_subtree;
+                guint32 number_of_different_sets, j;
+                guint64 name;
+
+                input_unit_subtree = proto_tree_add_subtree(tree, tvb, offset, 0, ett_isobus_vt_auxiliarycapabilities_inputunit, &input_unit_item, "Auxiliary Unit");
+
+                proto_tree_add_item_ret_uint64(input_unit_subtree,
+                    hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_name, tvb, offset, 8, ENC_LITTLE_ENDIAN, &name);
+                offset += 8;
+
+                proto_tree_add_item_ret_uint(input_unit_subtree,
+                    hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_numberofdifferentsets, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_different_sets);
+                offset += 1;
+
+                proto_item_set_text(input_unit_item, "Auxiliary unit name 0x%" G_GINT64_MODIFIER "X", name);
+                proto_item_set_len(input_unit_item, 8 + 1 + (3 * number_of_different_sets));
+
+                for(j = 0; j < number_of_different_sets; j++)
+                {
+                    proto_item *auxiliary_unit_set;
+                    proto_tree *preferred_function_subtree;
+                    guint32 number_of_instances, function_attribute, assigned_attribute;
+
+                    preferred_function_subtree = proto_tree_add_subtree(input_unit_subtree, tvb, offset, 3, ett_isobus_vt_auxiliarycapabilities_inputunit_set, &auxiliary_unit_set, "Auxiliary Unit");
+
+                    proto_tree_add_item_ret_uint(preferred_function_subtree,
+                        hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_set_numberofinstances, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_instances);
+                    offset += 1;
+
+                    proto_tree_add_item_ret_uint(preferred_function_subtree,
+                        hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_set_functionattribute, tvb, offset, 1, ENC_LITTLE_ENDIAN, &function_attribute);
+                    offset += 1;
+
+                    proto_tree_add_item_ret_uint(preferred_function_subtree,
+                        hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_set_assignedattribute, tvb, offset, 1, ENC_LITTLE_ENDIAN, &assigned_attribute);
+                    offset += 1;
+
+                    proto_item_set_text(input_unit_item, "Auxiliary set containing %u instances with function attribute %u assigned to %s",
+                        number_of_instances, function_attribute, val_to_str(assigned_attribute, auxiliary_assigned_attributes, "unknown"));
+                }
+            }
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Received Auxiliary Capabilities");
+        }
+    }
+        break;
+    case VT_ESC:
+        if(direction == vt_to_ecu)
+        {
+            guint32 object_id, error_codes;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_esc_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_esc_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "No input field is open for input, ESC ignored ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "ESC successful, %s", get_object_id_string(object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "ESC error");
+            }
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "End of object pool received, object pool accepted");
+        }
+        break;
+    case VT_HIDE_SHOW_OBJECT:
+    {
+        guint32 object_id, action;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_hideshowobj_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_hideshowobj_action, tvb, offset, 1, ENC_LITTLE_ENDIAN, &action);
+        offset += 1;
+
+        if(direction == vt_to_ecu)
+        {
+            guint32 error_codes;
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_hideshowobj_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Value ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Value in use ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Hide Show Error");
+            }
+            else
+            {
+                switch(action)
+                {
+                case 0:
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "%s is now hidden",
+                        get_object_id_string(object_id));
+                    break;
+                case 1:
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "%s is now shown",
+                        get_object_id_string(object_id));
+                    break;
+                }
+            }
+        }
+        else
+        {
+            switch(action)
+            {
+            case 0:
+                col_append_fstr(pinfo->cinfo, COL_INFO, "%s should hide",
+                    get_object_id_string(object_id));
+                break;
+            case 1:
+                col_append_fstr(pinfo->cinfo, COL_INFO, "%s should show",
+                    get_object_id_string(object_id));
+                break;
+            }
+        }
+    }
+        break;
+    case VT_ENABLE_DISABLE_COMMAND:
+    {
+        guint32 object_id, enable_disable;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_enabledisableobj_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_enabledisableobj_enabledisable, tvb, offset, 1, ENC_LITTLE_ENDIAN, &enable_disable);
+        offset += 1;
+
+        if(direction == ecu_to_vt)
+        {
+            switch(enable_disable)
+            {
+            case 0:
+                col_append_fstr(pinfo->cinfo, COL_INFO, "%s should disable",
+                    get_object_id_string(object_id));
+                break;
+            case 1:
+                col_append_fstr(pinfo->cinfo, COL_INFO, "%s should enable",
+                    get_object_id_string(object_id));
+                break;
+            }
+        }
+        else
+        {
+            guint32 error_codes;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_enabledisableobj_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Command error ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Could not complete. Operator input is active on this object. ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Enable Disable Error");
+            }
+            else
+            {
+                switch(enable_disable)
+                {
+                case 0:
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "%s is now disabled",
+                        get_object_id_string(object_id));
+                    break;
+                case 1:
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "%s is now enabled",
+                        get_object_id_string(object_id));
+                    break;
+                }
+
+            }
+        }
+    }
+        break;
+    case VT_SELECT_INPUT_OBJECT:
+    {
+        guint32 object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_selectinputobject_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == ecu_to_vt)
+        {
+            proto_tree_add_item(tree,
+                hf_isobus_vt_selectinputobject_option, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "%s should be selected for input",
+                get_object_id_string(object_id));
+        }
+        else
+        {
+            guint32 response, error_codes;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_selectinputobject_response, tvb, offset, 1, ENC_LITTLE_ENDIAN, &response);
+            offset += 1;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_selectinputobject_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Object is disabled ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Object is not on the active mask or object is in a hidden container ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Could not complete. Another Input field is currently being modified, or a Button or Soft Key is currently being held. ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+            if (error_codes & 0x20)
+                proto_item_append_text(ti, "Invalid option value ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while selecting input object");
+            }
+            else
+            {
+                switch(response)
+                {
+                    case 0:
+                        col_append_fstr(pinfo->cinfo, COL_INFO, "%s is not selected",
+                            get_object_id_string(object_id));
+                        break;
+                    case 1:
+                        col_append_fstr(pinfo->cinfo, COL_INFO, "%s is selected",
+                            get_object_id_string(object_id));
+                        break;
+                    case 2:
+                        col_append_fstr(pinfo->cinfo, COL_INFO, "%s is opened for edit",
+                            get_object_id_string(object_id));
+                        break;
+                }
+            }
+        }
+    }
+        break;
+    case VT_CONTROL_AUDIO_SIGNAL:
+    {
+        if(direction == ecu_to_vt)
+        {
+            guint32 activations, frequency, ontime, offtime;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_controlaudiosignal_activations, tvb, offset, 1, ENC_LITTLE_ENDIAN, &activations);
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_controlaudiosignal_frequency, tvb, offset, 2, ENC_LITTLE_ENDIAN, &frequency);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_controlaudiosignal_ontime, tvb, offset, 2, ENC_LITTLE_ENDIAN, &ontime);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_controlaudiosignal_offtime, tvb, offset, 2, ENC_LITTLE_ENDIAN, &offtime);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Control audio signal with %d activations of %d Hz (On-time %d ms, Off-time %d ms.)",
+                            activations, frequency, ontime, offtime);
+        }
+        else
+        {
+            guint32 error_codes;
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_controlaudiosignal_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Audio device is busy ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Control audio signal Error");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Control audio signal successful");
+            }
+        }
+    }
+        break;
+    case VT_SET_AUDIO_VOLUME:
+    {
+        if(direction == ecu_to_vt)
+        {
+            guint32 volume;
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_setaudiovolume_volume, tvb, offset, 1, ENC_LITTLE_ENDIAN, &volume);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Set audio volume to %d%%", volume);
+        }
+        else
+        {
+            guint32 error_codes;
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_setaudiovolume_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Audio device is busy, subsequent commands use the new setting ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Command is not supported ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Set audio volume Error");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Set audio volume successful");
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_CHILD_LOCATION:
+    {
+        guint32 parent_object_id, object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changechildlocation_parentobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &parent_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changechildlocation_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == ecu_to_vt)
+        {
+            guint32 rel_x_location, rel_y_location;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changechildlocation_relativexpos, tvb, offset, 1, ENC_LITTLE_ENDIAN, &rel_x_location);
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changechildlocation_relativeypos, tvb, offset, 1, ENC_LITTLE_ENDIAN, &rel_y_location);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change child location of %s in %s to [%u;%u]",
+                            get_object_id_string(object_id), get_object_id_string(parent_object_id), rel_x_location, rel_y_location);
+        }
+        else
+        {
+            guint32 error_codes;
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changechildlocation_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Parent Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Change child location error");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Change child location of %s in %s succeeded",
+                    get_object_id_string(object_id), get_object_id_string(parent_object_id));
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_SIZE:
+    {
+        guint32 object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changesize_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == ecu_to_vt)
+        {
+            guint32 new_width, new_height;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changesize_newwidth, tvb, offset, 2, ENC_LITTLE_ENDIAN, &new_width);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changesize_newheight, tvb, offset, 2, ENC_LITTLE_ENDIAN, &new_height);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change size of %s to %u x %u",
+                get_object_id_string(object_id), new_width, new_height);
+        }
+        else
+        {
+            guint32 error_codes;
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changesize_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Change size error");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Change size of %s succeeded",
+                    get_object_id_string(object_id));
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_BACKGROUND_COLOUR:
+    {
+        guint32 object_id, colour;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changebackgroundcolour_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changebackgroundcolour_colour, tvb, offset, 1, ENC_LITTLE_ENDIAN, &colour);
+        offset += 1;
+
+        if(direction == vt_to_ecu)
+        {
+            guint32 error_codes;
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changebackgroundcolour_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Value ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Value in use ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Background colour change error");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Background colour of %s has changed to %s",
+                    get_object_id_string(object_id), rval_to_str(colour, vt_colours, "Unknown"));
+            }
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Background colour of %s should change to %s",
+                get_object_id_string(object_id), rval_to_str(colour, vt_colours, "Unknown"));
+        }
+    }
+        break;
+    case VT_CHANGE_NUMERIC_VALUE:
+    {
+        guint32 object_id, error_codes, value;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_chgnumval_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_chgnumval_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Value ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Value in use ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+        } /* no else, byte is reserved for ecu_to_vt */
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_chgnumval_value, tvb, offset, 4, ENC_LITTLE_ENDIAN, &value);
+
+        if(direction == vt_to_ecu)
+        {
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Numeric value change error");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Numeric value of %s has changed to 0x%X",
+                    get_object_id_string(object_id), value);
+            }
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Numeric value of %s should change to 0x%X",
+                get_object_id_string(object_id), value);
+        }
+    }
+        break;
+    case VT_CHANGE_END_POINT:
+    {
+        guint32 object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changeendpoint_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == ecu_to_vt)
+        {
+            guint32 width, height;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changeendpoint_width, tvb, offset, 2, ENC_LITTLE_ENDIAN, &width);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changeendpoint_height, tvb, offset, 2, ENC_LITTLE_ENDIAN, &height);
+            offset += 2;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changeendpoint_linedirection, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change end point of line %s to width %d and height %d",
+                get_object_id_string(object_id), width, height);
+        }
+    }
+        break;
+    case VT_CHANGE_FONT_ATTRIBUTES:
+    {
+        guint32 object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changefontattributes_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == ecu_to_vt)
+        {
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changefontattributes_fontcolour, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changefontattributes_fontsize, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changefontattributes_fonttype, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changefontattributes_fontstyle, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change font attributes of %s", get_object_id_string(object_id));
+        }
+        else
+        {
+            guint32 error_codes;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changefontattributes_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid colour ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Invalid size ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Invalid type ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Invalid style ");
+            if (error_codes & 0x20)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes == 0)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Font attributes of %s successfully changed", get_object_id_string(object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing font attributes of %s", get_object_id_string(object_id));
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_LINE_ATTRIBUTES:
+    {
+        guint32 object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changelineattributes_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == ecu_to_vt)
+        {
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changelineattributes_linecolour, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changelineattributes_linewidth, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changelineattributes_lineart, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change line attributes of %s", get_object_id_string(object_id));
+        }
+        else
+        {
+            guint32 error_codes;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changelineattributes_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid colour ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Invalid width ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes == 0)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Line attributes of %s successfully changed", get_object_id_string(object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing line attributes of %s", get_object_id_string(object_id));
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_FILL_ATTRIBUTES:
+    {
+        guint32 object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changefillattributes_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == ecu_to_vt)
+        {
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changefillattributes_filltype, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changefillattributes_fillcolour, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changefillattributes_fillpatternobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change fill attributes of %s", get_object_id_string(object_id));
+        }
+        else
+        {
+            guint32 error_codes;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changefillattributes_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid type ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Invalid colour ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Invalid pattern Object ID ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes == 0)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Fill attributes of %s successfully changed", get_object_id_string(object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing fill attributes of %s", get_object_id_string(object_id));
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_ACTIVE_MASK:
+    {
+        guint32 working_set_object_id, new_active_mask_object_id, error_codes;
+
+        if(direction == ecu_to_vt)
+        {
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changeactivemask_workingset, tvb, offset, 2, ENC_LITTLE_ENDIAN, &working_set_object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+        }
+        else
+        {
+            working_set_object_id = 0;
+        }
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changeactivemask_newactivemask, tvb, offset, 2, ENC_LITTLE_ENDIAN, &new_active_mask_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changeactivemask_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Working Set Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Mask Object ID ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change active mask of working set %s to %s", get_object_id_string(working_set_object_id), get_object_id_string(new_active_mask_object_id));
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes == 0)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Active mask successfully changed to %s", get_object_id_string(new_active_mask_object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing active mask to %s", get_object_id_string(new_active_mask_object_id));
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_SOFT_KEY_MASK:
+    {
+        guint32 error_codes, data_mask_object_id, new_soft_key_mask_object_id;
+
+        if(direction == ecu_to_vt)
+        {
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changesoftkeymask_masktype, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+        }
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changesoftkeymask_datamaskobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &data_mask_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changesoftkeymask_newsoftkeymaskobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &new_soft_key_mask_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changesoftkeymask_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Data or Alarm Mask Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Soft Key Mask Object ID ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Missing Objects ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Mask or child object has errors ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Soft key mask of %s should change to %s", get_object_id_string(data_mask_object_id), get_object_id_string(new_soft_key_mask_object_id));
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes == 0)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Soft key mask of %s successfully changed to %s", get_object_id_string(data_mask_object_id), get_object_id_string(new_soft_key_mask_object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing soft key mask of %s to %s", get_object_id_string(data_mask_object_id), get_object_id_string(new_soft_key_mask_object_id));
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_ATTRIBUTES:
+    {
+        guint32 attribute_id, error_codes, object_id, new_value;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changeattributes_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changeattributes_attributeid, tvb, offset, 1, ENC_LITTLE_ENDIAN, &attribute_id);
+        offset += 1;
+
+        if(direction == ecu_to_vt)
+        {
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changeattributes_newvalue, tvb, offset, 1, ENC_LITTLE_ENDIAN, &new_value);
+        }
+        else if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changeattributes_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Attribute ID ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Invalid Value ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Value in use ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Attribute ID %u of %s should change to 0x%X", attribute_id, get_object_id_string(object_id), new_value);
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing Attribute ID %u of %s", attribute_id, get_object_id_string(object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Attribute ID %u of %s has successfully changed", attribute_id, get_object_id_string(object_id));
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_PRIORITY:
+    {
+        guint32 object_id, new_priority, error_codes;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changepriority_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changepriority_newpriority, tvb, offset, 1, ENC_LITTLE_ENDIAN, &new_priority);
+        offset += 1;
+
+        if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changepriority_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid priority ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Priority of alarm mask with %s should change to %u", get_object_id_string(object_id), new_priority);
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing priority of alarm mask with %s to %u", get_object_id_string(object_id), new_priority);
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Priority of alarm mask with %s has successfully changed to %u", get_object_id_string(object_id), new_priority);
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_LIST_ITEM:
+    {
+        guint32 list_object_id, new_object_id, list_index, error_codes;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changelistitem_listobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &list_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changelistitem_listindex, tvb, offset, 1, ENC_LITTLE_ENDIAN, &list_index);
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changelistitem_newobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &new_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changelistitem_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Input List object ID or Output List object ID, Animation object, External Object Definition object ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid List Index ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Invalid New List Item Object ID ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Value in user ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "%s should be added to list %s at index %u", get_object_id_string(new_object_id), get_object_id_string(list_object_id), list_index);
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while adding %s to list %s at index %u", get_object_id_string(new_object_id), get_object_id_string(list_object_id), list_index);
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "%s was successfully added to %s at index %u", get_object_id_string(new_object_id), get_object_id_string(list_object_id), list_index);
+            }
+        }
+    }
+        break;
+    case VT_DELETE_OBJECT_POOL:
+    {
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Object pool should be deleted from volatile memory");
+        }
+        else
+        {
+            guint32 error_codes;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_deleteobjectpool_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Deletion Error ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while deleting object pool from volatile memory");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Object pool was successfully deleted from volatile memory");
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_STRING_VALUE:
+    {
+        if(direction == ecu_to_vt)
+        {
+            guint encoding = ENC_ASCII|ENC_NA;
+            guint32 object_id, str_length;
+            guint16 firstTwoBytesString;
+            const guint8* value;
+            guint bomOffset = 0;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_chgstrval_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_chgstrval_length, tvb, offset, 2, ENC_LITTLE_ENDIAN, &str_length);
+            offset += 2;
+
+            firstTwoBytesString = tvb_get_letohs(tvb,offset);
+            if(firstTwoBytesString == 0xFEFF)
+            {
+                encoding = ENC_UCS_2;
+                bomOffset = 2;
+            }
+
+            proto_tree_add_item_ret_string(tree,
+                hf_isobus_vt_chgstrval_value, tvb, offset + bomOffset, str_length - bomOffset, encoding, wmem_packet_scope(), &value);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "String value of %s should change to %s",
+                get_object_id_string(object_id), value);
+        }
+        else
+        {
+            guint32 object_id, error_codes;
+
+            offset += 2;    /*first two bytes are reserved*/
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_chgstrval_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_chgstrval_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "String too long ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Any other error ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Value in use ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "String value change error");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "String value of %s has changed",
+                    get_object_id_string(object_id));
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_CHILD_POSITION:
+    {
+        guint32 parent_object_id, object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changechildposition_parentobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &parent_object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changechildposition_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == ecu_to_vt)
+        {
+            guint32 rel_x_position, rel_y_position;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changechildposition_xpos, tvb, offset, 2, ENC_LITTLE_ENDIAN, &rel_x_position);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changechildposition_ypos, tvb, offset, 2, ENC_LITTLE_ENDIAN, &rel_y_position);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change child position of %s in %s to [%u:%u]",
+                get_object_id_string(object_id), get_object_id_string(parent_object_id), rel_x_position, rel_y_position);
+        }
+        else
+        {
+            guint32 error_codes;
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changechildposition_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Parent Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing child position of %s", get_object_id_string(object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Change child position of %s in %s succeeded",
+                    get_object_id_string(object_id), get_object_id_string(parent_object_id));
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_OBJECT_LABEL:
+    {
+        if(direction == ecu_to_vt)
+        {
+            guint32 object_id, string_object_id;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changeobjectlabel_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changeobjectlabel_stringobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &string_object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changeobjectlabel_fonttype, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_changeobjectlabel_graphicobjectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change object label of %s to string %s",
+                            get_object_id_string(object_id), get_object_id_string(string_object_id));
+        }
+        else
+        {
+            guint32 error_codes;
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changeobjectlabel_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid object id ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid String Variable object id ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Invalid font type ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "No Object Label Reference List object available in object pool ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Designator references invalid objects ");
+            if (error_codes & 0x20)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing object label");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Object label successfully changed");
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_POLYGON_POINT:
+    {
+        guint32 object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changepolygonpoint_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == ecu_to_vt)
+        {
+            guint32 x_value, y_value, point_index;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changepolygonpoint_pointindex, tvb, offset, 1, ENC_LITTLE_ENDIAN, &point_index);
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changepolygonpoint_xvalue, tvb, offset, 2, ENC_LITTLE_ENDIAN, &x_value);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changepolygonpoint_yvalue, tvb, offset, 2, ENC_LITTLE_ENDIAN, &y_value);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change point %u of polygon %s to location [%u:%u] ",
+                point_index, get_object_id_string(object_id), x_value, y_value);
+        }
+        else
+        {
+            guint32 error_codes;
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changepolygonpoint_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid point index ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing polygon point");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Polygon point successfully changed");
+            }
+        }
+    }
+        break;
+    case VT_CHANGE_POLYGON_SCALE:
+    {
+        guint32 object_id, new_width, new_height, error_codes;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changepolygonscale_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changepolygonscale_newwidth, tvb, offset, 2, ENC_LITTLE_ENDIAN, &new_width);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_changepolygonscale_newheight, tvb, offset, 2, ENC_LITTLE_ENDIAN, &new_height);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_changepolygonscale_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Change scale of polygon %s to width %u and height %u ",
+                get_object_id_string(object_id), new_width, new_height);
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while changing scale of polygon %s to width %u and height %u ",
+                    get_object_id_string(object_id), new_width, new_height);
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Scale of polygon %s scale successfully changed to width %u and height %u ",
+                    get_object_id_string(object_id), new_width, new_height);
+            }
+        }
+    }
+        break;
+    case VT_GRAPHICS_CONTEXT:
+    {
+        guint32 object_id, sub_command_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_graphicscontext_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_graphicscontext_subcommandid, tvb, offset, 1, ENC_LITTLE_ENDIAN, &sub_command_id);
+        offset += 1;
+
+        col_append_fstr(pinfo->cinfo, COL_INFO, "Graphic Context of %s: ", get_object_id_string(object_id));
+
+        switch(sub_command_id)
+        {
+            case SET_GRAPHICS_CURSOR:
+            {
+                gint32 x_position, y_position;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_setgraphicscursor_xposition, tvb, offset, 2, ENC_LITTLE_ENDIAN, &x_position);
+                offset += 2;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_setgraphicscursor_yposition, tvb, offset, 2, ENC_LITTLE_ENDIAN, &y_position);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Set Graphics Cursor to Position [%d;%d] ",
+                    x_position, y_position);
+            }
+                break;
+            case MOVE_GRAPHICS_CURSOR:
+            {
+                gint32 x_offset, y_offset;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_movegraphicscursor_xoffset, tvb, offset, 2, ENC_LITTLE_ENDIAN, &x_offset);
+                offset += 2;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_movegraphicscursor_yoffset, tvb, offset, 2, ENC_LITTLE_ENDIAN, &y_offset);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Move Graphics Cursor by Offset [%d;%d] ",
+                    x_offset, y_offset);
+            }
+                break;
+            case SET_FOREGROUND_COLOUR:
+            {
+                guint32 colour;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_setforegroundcolour_colour, tvb, offset, 1, ENC_LITTLE_ENDIAN, &colour);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Set Foreground Colour to %u",
+                    colour);
+            }
+                break;
+            case SET_BACKGROUND_COLOUR:
+            {
+                guint32 colour;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_setbackgroundcolour_colour, tvb, offset, 1, ENC_LITTLE_ENDIAN, &colour);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Set Background Colour to %u",
+                    colour);
+            }
+                break;
+            case SET_LINE_ATTRIBUTES_OBJECT_ID:
+            {
+                guint32 line_attr_object_id;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_setlineattributesobjectid_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &line_attr_object_id);
+                ti = proto_tree_add_item(tree,
+                    hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+                PROTO_ITEM_SET_HIDDEN(ti);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Set Line Attributes to %s",
+                    get_object_id_string(line_attr_object_id));
+            }
+                break;
+            case SET_FILL_ATTRIBUTES_OBJECT_ID:
+            {
+                guint32 fill_attr_object_id;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_setfillattributesobjectid_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &fill_attr_object_id);
+                ti = proto_tree_add_item(tree,
+                    hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+                PROTO_ITEM_SET_HIDDEN(ti);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Set Fill Attributes to %s",
+                    get_object_id_string(fill_attr_object_id));
+            }
+                break;
+            case SET_FONT_ATTRIBUTES_OBJECT_ID:
+            {
+                guint32 font_attr_object_id;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_setfontattributesobjectid_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &font_attr_object_id);
+                ti = proto_tree_add_item(tree,
+                    hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+                PROTO_ITEM_SET_HIDDEN(ti);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Set Font Attributes to %s",
+                    get_object_id_string(font_attr_object_id));
+            }
+                break;
+            case ERASE_RECTANGLE:
+            {
+                guint32 width, height;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_eraserectangle_width, tvb, offset, 2, ENC_LITTLE_ENDIAN, &width);
+                offset += 2;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_eraserectangle_height, tvb, offset, 2, ENC_LITTLE_ENDIAN, &height);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Erase Rectangle width %u height %u",
+                    width, height);
+            }
+                break;
+            case DRAW_POINT:
+            {
+                gint32 x_offset, y_offset;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_drawpoint_xoffset, tvb, offset, 2, ENC_LITTLE_ENDIAN, &x_offset);
+                offset += 2;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_drawpoint_yoffset, tvb, offset, 2, ENC_LITTLE_ENDIAN, &y_offset);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Draw point at graphics cursor with offset [%d;%d] ",
+                    x_offset, y_offset);
+            }
+                break;
+            case DRAW_LINE:
+            {
+                gint32 x_offset, y_offset;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_drawline_xoffset, tvb, offset, 2, ENC_LITTLE_ENDIAN, &x_offset);
+                offset += 2;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_drawline_yoffset, tvb, offset, 2, ENC_LITTLE_ENDIAN, &y_offset);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Draw line from graphics cursor to offset [%d;%d] ",
+                    x_offset, y_offset);
+            }
+                break;
+            case DRAW_RECTANGLE:
+            {
+                guint32 width, height;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_drawrectangle_width, tvb, offset, 2, ENC_LITTLE_ENDIAN, &width);
+                offset += 2;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_drawrectangle_height, tvb, offset, 2, ENC_LITTLE_ENDIAN, &height);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Draw Rectangle width %u height %u",
+                    width, height);
+            }
+                break;
+            case DRAW_CLOSED_ELLIPSE:
+            {
+                guint32 width, height;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_drawclosedellipse_width, tvb, offset, 2, ENC_LITTLE_ENDIAN, &width);
+                offset += 2;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_drawclosedellipse_height, tvb, offset, 2, ENC_LITTLE_ENDIAN, &height);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Draw Closed Ellipse width %u height %u",
+                    width, height);
+            }
+                break;
+            case DRAW_POLYGON:
+            {
+                guint32 number_of_points, i;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_drawpolygon_numberofpoints, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_points);
+                offset += 1;
+
+                for(i = 0; i < number_of_points; i++)
+                {
+                    proto_item *point_item;
+                    proto_tree *point_subtree;
+                    gint32 x_offset, y_offset;
+
+                    point_subtree = proto_tree_add_subtree(tree,
+                        tvb, offset, 4, ett_isobus_vt_getsupportedwidechars_range, &point_item, "Point");
+
+                    proto_tree_add_item_ret_int(point_subtree,
+                        hf_isobus_vt_graphicscontext_drawpolygon_point_xoffset, tvb, offset, 2, ENC_LITTLE_ENDIAN, &x_offset);
+                    offset += 2;
+
+                    proto_tree_add_item_ret_int(point_subtree,
+                        hf_isobus_vt_graphicscontext_drawpolygon_point_yoffset, tvb, offset, 2, ENC_LITTLE_ENDIAN, &y_offset);
+                    offset += 2;
+
+                    proto_item_set_text(point_item, "Point with offset [%d;%d]", x_offset, y_offset);
+                }
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Draw Polygon of %u points",
+                    number_of_points);
+            }
+                break;
+            case DRAW_TEXT:
+            {
+                guint encoding = ENC_ASCII|ENC_NA;
+                guint16 firstTwoBytesString;
+                guint bomOffset = 0;
+                guint32 background, number_of_bytes;
+                const guint8* value;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_drawtext_background, tvb, offset, 1, ENC_LITTLE_ENDIAN, &background);
+                offset += 1;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_drawtext_numberofbytes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_bytes);
+                offset += 1;
+
+                firstTwoBytesString = tvb_get_letohs(tvb,offset);
+                if(firstTwoBytesString == 0xFEFF)
+                {
+                    encoding = ENC_UCS_2;
+                    bomOffset = 2;
+                }
+
+                proto_tree_add_item_ret_string(tree,
+                    hf_isobus_vt_graphicscontext_drawtext_textstring, tvb, offset + bomOffset, number_of_bytes - bomOffset, encoding, wmem_packet_scope(), &value);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Draw string \"%s\" at cursor with a %s background",
+                    value, val_to_str(background, draw_text_background, "unknown"));
+            }
+                break;
+            case PAN_VIEWPORT:
+            {
+                gint32 viewport_x, viewport_y;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_panviewport_viewportx, tvb, offset, 2, ENC_LITTLE_ENDIAN, &viewport_x);
+                offset += 2;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_panviewport_viewporty, tvb, offset, 2, ENC_LITTLE_ENDIAN, &viewport_y);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Pan Viewport by [%d;%d] pixels",
+                    viewport_x, viewport_y);
+            }
+                break;
+            case ZOOM_VIEWPORT:
+            {
+                gfloat zoom_value;
+
+                zoom_value = tvb_get_ieee_float(tvb, offset, ENC_LITTLE_ENDIAN);
+                proto_tree_add_item(tree,
+                    hf_isobus_vt_graphicscontext_zoomviewport_zoomvalue, tvb, offset, 4, ENC_LITTLE_ENDIAN);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Zoom Viewport by %g",
+                    zoom_value);
+            }
+                break;
+            case PAN_AND_ZOOM_VIEWPORT:
+            {
+                gfloat zoom_value;
+                gint32 viewport_x, viewport_y;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_panandzoomviewport_viewportx, tvb, offset, 2, ENC_LITTLE_ENDIAN, &viewport_x);
+                offset += 2;
+
+                proto_tree_add_item_ret_int(tree,
+                    hf_isobus_vt_graphicscontext_panandzoomviewport_viewporty, tvb, offset, 2, ENC_LITTLE_ENDIAN, &viewport_y);
+                offset += 2;
+
+                zoom_value = tvb_get_ieee_float(tvb, offset, ENC_LITTLE_ENDIAN);
+                proto_tree_add_item(tree,
+                    hf_isobus_vt_graphicscontext_panandzoomviewport_zoomvalue, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Pan viewport by [%d;%d] pixels and zoom by %g",
+                    viewport_x, viewport_y, zoom_value);
+            }
+                break;
+            case CHANGE_VIEWPORT_SIZE:
+            {
+                guint32 new_width, new_height;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_changeviewportsize_newwidth, tvb, offset, 2, ENC_LITTLE_ENDIAN, &new_width);
+                offset += 2;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_changeviewportsize_newheight, tvb, offset, 2, ENC_LITTLE_ENDIAN, &new_height);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Change viewport size to [%ux%u]",
+                    new_width, new_height);
+            }
+                break;
+            case DRAW_VT_OBJECT:
+            {
+                guint32 draw_object_id;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_drawvtobject_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &draw_object_id);
+                ti = proto_tree_add_item(tree,
+                    hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+                PROTO_ITEM_SET_HIDDEN(ti);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Draw VT %s at graphics cursor",
+                    get_object_id_string(draw_object_id));
+            }
+                break;
+            case COPY_CANVAS_TO_PICTURE_GRAPHIC:
+            {
+                guint32 object_id_picture_graphic;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_copycanvastopicturegraphic_objectidpicturegraphic, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id_picture_graphic);
+                ti = proto_tree_add_item(tree,
+                    hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+                PROTO_ITEM_SET_HIDDEN(ti);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Copy canvas to picture graphics %s",
+                    get_object_id_string(object_id_picture_graphic));
+            }
+                break;
+            case COPY_VIEWPORT_TO_PICTURE_GRAPHIC:
+            {
+                guint32 object_id_picture_graphic;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_graphicscontext_copyviewporttopicturegraphic_objectidpicturegraphic, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id_picture_graphic);
+                ti = proto_tree_add_item(tree,
+                    hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+                PROTO_ITEM_SET_HIDDEN(ti);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Copy viewport to picture graphics %s",
+                    get_object_id_string(object_id_picture_graphic));
+            }
+                break;
+        }
+    }
+        break;
+    case VT_GET_ATTRIBUTE_VALUE:
+    {
+        gboolean error_frame;
+        guint32 attribute_id, object_id;
+
+        object_id = tvb_get_letohs(tvb, offset);
+        if(direction == ecu_to_vt || object_id != 0xFFFF)
+        {
+            error_frame = FALSE;
+            proto_tree_add_item(tree,
+                hf_isobus_vt_getattributevalue_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+        }
+        else
+        {
+            error_frame = TRUE;
+        }
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_getattributevalue_attributeid, tvb, offset, 1, ENC_LITTLE_ENDIAN, &attribute_id);
+        offset += 1;
+
+        if(direction == vt_to_ecu)
+        {
+            if(error_frame == FALSE)
+            {
+                guint32 value;
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_getattributevalue_value, tvb, offset, 4, ENC_LITTLE_ENDIAN, &value);
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Return value of attribute %u from %s, value is 0x%X ",
+                    attribute_id, get_object_id_string(object_id), value);
+            }
+            else
+            {
+                guint32 error_codes;
+
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_getattributevalue_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+                ti = proto_tree_add_item(tree,
+                    hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+                PROTO_ITEM_SET_HIDDEN(ti);
+                offset += 2;
+
+                ti = proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_getattributevalue_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+                proto_item_append_text(ti, ": ");
+                if (error_codes & 0x01)
+                    proto_item_append_text(ti, "Invalid Object ID ");
+                if (error_codes & 0x02)
+                    proto_item_append_text(ti, "Invalid Attribute ID ");
+                if (error_codes & 0x10)
+                    proto_item_append_text(ti, "Any other error ");
+
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while requesting value of attribute %u from %s ",
+                    attribute_id, get_object_id_string(object_id));
+            }
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Get value of attribute %u from %s ",
+                attribute_id, get_object_id_string(object_id));
+        }
+    }
+        break;
+    case VT_SELECT_COLOUR_MAP:
+    {
+        guint32 error_codes, object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_selectcolourmap_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_selectcolourmap_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Invalid Object ID ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Invalid Colour Map ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Select colour map %s ",
+                get_object_id_string(object_id));
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while selecting colour map %s ",
+                    get_object_id_string(object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Colour map %s successfully selected ",
+                    get_object_id_string(object_id));
+            }
+        }
+    }
+        break;
+    case VT_IDENTIFY_VT:
+    {
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Identify VT");
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Reply Identify VT ");
+        }
+    }
+        break;
+    case VT_EXECUTE_EXTENDED_MACRO:
+    {
+        guint32 error_codes, object_id;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_executeextendedmacro_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_executeextendedmacro_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Object ID does not exist ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Object ID is not a Macro object ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Execute extended macro %s ",
+                get_object_id_string(object_id));
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while executing extended macro %s ",
+                    get_object_id_string(object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Extended macro %s successfully executed ",
+                    get_object_id_string(object_id));
+            }
+        }
+    }
+        break;
+    case VT_LOCK_UNLOCK_MASK:
+    {
+        guint32 command, error_codes, object_id, lock_timeout;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_lockunlockmask_command, tvb, offset, 1, ENC_LITTLE_ENDIAN, &command);
+        offset += 1;
+
+        if(direction == ecu_to_vt)
+        {
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_lockunlockmask_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id);
+            ti = proto_tree_add_item(tree,
+                hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            PROTO_ITEM_SET_HIDDEN(ti);
+            offset += 2;
+
+            if(command == MASK_LOCK)
+            {
+                proto_tree_add_item_ret_uint(tree,
+                    hf_isobus_vt_lockunlockmask_locktimeout, tvb, offset, 2, ENC_LITTLE_ENDIAN, &lock_timeout);
+            }
+        }
+        else
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_lockunlockmask_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Command ignored, no mask is visible or given Object ID does not match the visible mask ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Lock command ignored, already locked ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Unlock command ignored, not locked ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Lock command ignored, an Alarm Mask is active ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Unsolicited unlock, timeout occurred ");
+            if (error_codes & 0x20)
+                proto_item_append_text(ti, "Unsolicited unlock, this mask is hidden ");
+            if (error_codes & 0x40)
+                proto_item_append_text(ti, "Unsolicited unlock, operator induced, or any other error ");
+            if (error_codes & 0x80)
+                proto_item_append_text(ti, "Any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            if(command == MASK_LOCK)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Lock data mask %s for %ums ",
+                    get_object_id_string(object_id), lock_timeout);
+            }
+            else if(command == MASK_UNLOCK)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Unlock data mask %s ",
+                    get_object_id_string(object_id));
+            }
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes)
+            {
+                if(command == MASK_LOCK)
+                {
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "Error while locking ");
+                }
+                else if(command == MASK_UNLOCK)
+                {
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "Error while unlocking ");
+                }
+            }
+            else
+            {
+                if(command == MASK_LOCK)
+                {
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "Locking successfull ");
+                }
+                else if(command == MASK_UNLOCK)
+                {
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "Unlocking successfull ");
+                }
+            }
+        }
+    }
+        break;
+    case VT_EXECUTE_MACRO:
+    {
+        guint32 object_id;
+        guint32 error_codes;
+
+        /* Other than all object IDs macro object IDs are 1 byte in VT 4 */
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_executemacro_objectid, tvb, offset, 1, ENC_LITTLE_ENDIAN, &object_id);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 1;
+
+        if(direction == vt_to_ecu)
+        {
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_executemacro_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Object ID does not exist ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Object ID is not a Macro object ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Any other error ");
+        }
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Execute macro %s ",
+                get_object_id_string(object_id));
+        }
+        else if(direction == vt_to_ecu)
+        {
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while executing macro %s ",
+                    get_object_id_string(object_id));
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Macro %s successfully executed ",
+                    get_object_id_string(object_id));
+            }
+        }
+    }
+        break;
+    case VT_GET_MEMORY:
+    {
+        if(direction == ecu_to_vt)
+        {
+            guint32 memory_required;
+            offset += 1; /* reserved byte */
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getmemory_memoryrequired, tvb, offset, 4, ENC_LITTLE_ENDIAN, &memory_required);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "The amount of memory required is %u ",
+                memory_required);
+        }
+        else
+        {
+            guint32 vt_version, status;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getmemory_vtversion, tvb, offset, 1, ENC_LITTLE_ENDIAN, &vt_version);
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getmemory_status, tvb, offset, 1, ENC_LITTLE_ENDIAN, &status);
+
+            if(status == ENOUGH_MEMORY)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "There can be enough memory, VT Version is %u ",
+                    vt_version);
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "There is not enough memory available, VT Version is %u ",
+                    vt_version);
+            }
+        }
+    }
+        break;
+    case VT_GET_SUPPORTED_WIDECHARS:
+    {
+        guint32 code_plane, first_widechar, last_widechar;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_getsupportedwidechars_codeplane, tvb, offset, 1, ENC_LITTLE_ENDIAN, &code_plane);
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_getsupportedwidechars_firstwidechar, tvb, offset, 2, ENC_LITTLE_ENDIAN, &first_widechar);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_getsupportedwidechars_lastwidechar, tvb, offset, 2, ENC_LITTLE_ENDIAN, &last_widechar);
+        offset += 2;
+
+        if(direction == vt_to_ecu)
+        {
+            guint32 error_codes, number_of_ranges, i;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getsupportedwidechars_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "Too many ranges ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Error in Code plane ");
+            if (error_codes & 0x10)
+                proto_item_append_text(ti, "Any other error ");
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getsupportedwidechars_numberofranges, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_ranges);
+            offset += 1;
+
+            for(i = 0; i < number_of_ranges; i++)
+            {
+                guint32 first_avail_widechar, last_avail_widechar;
+                proto_tree* subtree;
+                proto_item* item;
+
+                subtree = proto_tree_add_subtree_format(tree,
+                    tvb, offset, 4, ett_isobus_vt_getsupportedwidechars_range, &item, "Range");
+
+                proto_tree_add_item_ret_uint(subtree,
+                    hf_isobus_vt_getsupportedwidechars_firstavailablewidechar, tvb, offset, 2, ENC_LITTLE_ENDIAN, &first_avail_widechar);
+                offset += 2;
+
+                proto_tree_add_item_ret_uint(subtree,
+                    hf_isobus_vt_getsupportedwidechars_lastavailablewidechar, tvb, offset, 2, ENC_LITTLE_ENDIAN, &last_avail_widechar);
+                offset += 2;
+
+                proto_item_set_text(item, "Range 0x%04X - 0x%04X", first_avail_widechar, last_avail_widechar);
+            }
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while getting supported widechars for code plane %u ",
+                    code_plane);
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Received supported widechars for code plane %u in %u range",
+                    code_plane, number_of_ranges);
+
+                if(number_of_ranges > 1)
+                {
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "s");
+                }
+            }
+        }
+        else if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Requesting supported widechars for code plane %u from character 0x%04X till 0x%04X ",
+                    code_plane, first_widechar, last_widechar);
+        }
+    }
+        break;
+    case VT_GET_NUMBER_OF_SOFT_KEYS:
+    {
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Requesting number of soft keys");
+        }
+        else
+        {
+            guint32 navigation_soft_keys, virtual_soft_keys, physical_soft_keys;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getnumberofsoftkeys_navigationsoftkeys, tvb, offset, 1, ENC_LITTLE_ENDIAN, &navigation_soft_keys);
+            offset += 1;
+
+            offset += 2; /* 2 reserved bytes */
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_getnumberofsoftkeys_xdots, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_getnumberofsoftkeys_ydots, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getnumberofsoftkeys_virtualsoftkeys, tvb, offset, 1, ENC_LITTLE_ENDIAN, &virtual_soft_keys);
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getnumberofsoftkeys_physicalsoftkeys, tvb, offset, 1, ENC_LITTLE_ENDIAN, &physical_soft_keys);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "VT has %u softkeys, %u virtual soft keys and %u physical soft keys",
+                navigation_soft_keys, virtual_soft_keys, physical_soft_keys);
+        }
+    }
+        break;
+    case VT_GET_TEXT_FONT_DATA:
+    {
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Requesting text font data");
+        }
+        else if(direction == vt_to_ecu)
+        {
+            proto_tree *ti_smallfonts_subtree, *ti_largefonts_subtree, *ti_typeattribute_subtree;
+            proto_item *smallfonts_item, *largefonts_item, *typeattributes_item;
+
+            offset += 4;
+
+            smallfonts_item = proto_tree_add_item(tree,
+                hf_isobus_vt_gettextfontdata_smallfontsizes, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            ti_smallfonts_subtree = proto_item_add_subtree(smallfonts_item, ett_isobus_vt_gettextfontdata_smallfontsizes);
+            proto_tree_add_item(ti_smallfonts_subtree, hf_isobus_vt_gettextfontdata_smallfontsizes_font8x8, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_smallfonts_subtree, hf_isobus_vt_gettextfontdata_smallfontsizes_font8x12, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_smallfonts_subtree, hf_isobus_vt_gettextfontdata_smallfontsizes_font12x16, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_smallfonts_subtree, hf_isobus_vt_gettextfontdata_smallfontsizes_font16x16, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_smallfonts_subtree, hf_isobus_vt_gettextfontdata_smallfontsizes_font16x24, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_smallfonts_subtree, hf_isobus_vt_gettextfontdata_smallfontsizes_font24x32, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_smallfonts_subtree, hf_isobus_vt_gettextfontdata_smallfontsizes_font32x32, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            largefonts_item = proto_tree_add_item(tree,
+                hf_isobus_vt_gettextfontdata_largefontsizes, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            ti_largefonts_subtree = proto_item_add_subtree(largefonts_item, ett_isobus_vt_gettextfontdata_largefontsizes);
+            proto_tree_add_item(ti_largefonts_subtree, hf_isobus_vt_gettextfontdata_largefontsizes_font32x48, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_largefonts_subtree, hf_isobus_vt_gettextfontdata_largefontsizes_font48x64, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_largefonts_subtree, hf_isobus_vt_gettextfontdata_largefontsizes_font64x64, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_largefonts_subtree, hf_isobus_vt_gettextfontdata_largefontsizes_font64x96, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_largefonts_subtree, hf_isobus_vt_gettextfontdata_largefontsizes_font96x128, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_largefonts_subtree, hf_isobus_vt_gettextfontdata_largefontsizes_font128x128, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_largefonts_subtree, hf_isobus_vt_gettextfontdata_largefontsizes_font128x192, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            typeattributes_item = proto_tree_add_item(tree,
+                hf_isobus_vt_gettextfontdata_typeattributes, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            ti_typeattribute_subtree = proto_item_add_subtree(typeattributes_item, ett_isobus_vt_gettextfontdata_typeattributes);
+            proto_tree_add_item(ti_typeattribute_subtree, hf_isobus_vt_gettextfontdata_typeattributes_boldtext, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_typeattribute_subtree, hf_isobus_vt_gettextfontdata_typeattributes_crossedouttext, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_typeattribute_subtree, hf_isobus_vt_gettextfontdata_typeattributes_underlinedtext, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_typeattribute_subtree, hf_isobus_vt_gettextfontdata_typeattributes_italicstext, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_typeattribute_subtree, hf_isobus_vt_gettextfontdata_typeattributes_invertedtext, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_typeattribute_subtree, hf_isobus_vt_gettextfontdata_typeattributes_flashinverted, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_typeattribute_subtree, hf_isobus_vt_gettextfontdata_typeattributes_flashhidden, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(ti_typeattribute_subtree, hf_isobus_vt_gettextfontdata_typeattributes_proportionalfontrendering, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Text font data received");
+        }
+    }
+        break;
+    case VT_GET_WINDOW_MASK_DATA:
+    {
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Request window mask data");
+        }
+        else
+        {
+            guint32 background_colour_data_mask, background_colour_soft_key_mask;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getwindowmaskdata_backgroundcolourdatamask, tvb, offset, 1, ENC_LITTLE_ENDIAN, &background_colour_data_mask);
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getwindowmaskdata_backgroundcoloursoftkeymask, tvb, offset, 1, ENC_LITTLE_ENDIAN, &background_colour_soft_key_mask);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Background colour of data mask is %s, soft key mask is %s",
+                rval_to_str(background_colour_data_mask, vt_colours, "Unknown"),
+                rval_to_str(background_colour_soft_key_mask, vt_colours, "Unknown"));
+        }
+    }
+        break;
+    case VT_GET_SUPPORTED_OBJECTS:
+    {
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Request supported objects");
+        }
+        else
+        {
+            guint32 number_of_bytes, i;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getsupportedobjects_numberofbytes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_bytes);
+            offset += 1;
+
+            for(i = 0; i < number_of_bytes; i++)
+            {
+                guint8 object_type;
+
+                object_type = tvb_get_guint8(tvb, offset);
+                if(object_type == 0xFF)
+                {
+                    break;
+                }
+
+                proto_tree_add_item(tree,
+                    hf_isobus_vt_getsupportedobjects_objecttype, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+                offset += 1;
+            }
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Supported objects received");
+        }
+    }
+        break;
+    case VT_GET_HARDWARE:
+    {
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Request hardware info");
+        }
+        else
+        {
+            guint32 graphic_type, x_pixels, y_pixels;
+            proto_item *hardware_item;
+            proto_tree *hardware_subtree;
+
+            proto_tree_add_item(tree,
+                hf_isobus_vt_gethardware_boottime, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_gethardware_graphictype, tvb, offset, 1, ENC_LITTLE_ENDIAN, &graphic_type);
+            offset += 1;
+
+            hardware_item = proto_tree_add_item(tree,
+                hf_isobus_vt_gethardware_hardware, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+
+            hardware_subtree = proto_item_add_subtree(hardware_item, ett_isobus_vt_gethardware_hardware);
+            proto_tree_add_item(hardware_subtree, hf_isobus_vt_gethardware_hardware_touchscreen, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(hardware_subtree, hf_isobus_vt_gethardware_hardware_pointingdevice, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(hardware_subtree, hf_isobus_vt_gethardware_hardware_multifreqaudiooutput, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(hardware_subtree, hf_isobus_vt_gethardware_hardware_adjustvolumeaudiooutput, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(hardware_subtree, hf_isobus_vt_gethardware_hardware_simultaneousactivationphysicalsoftkeys, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(hardware_subtree, hf_isobus_vt_gethardware_hardware_simultaneousactivationbuttons, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(hardware_subtree, hf_isobus_vt_gethardware_hardware_dragoperation, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            proto_tree_add_item(hardware_subtree, hf_isobus_vt_gethardware_hardware_intermediatecoordinatesdrag, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+            offset += 1;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_gethardware_xpixels, tvb, offset, 2, ENC_LITTLE_ENDIAN, &x_pixels);
+            offset += 2;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_gethardware_ypixels, tvb, offset, 2, ENC_LITTLE_ENDIAN, &y_pixels);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Hardware info received. Graphic type is %s, screen is %u by %u pixels",
+                val_to_str(graphic_type, graphic_types, "unknown"), x_pixels, y_pixels);
+        }
+    }
+        break;
+    case VT_STORE_VERSION:
+    {
+        if(direction == ecu_to_vt)
+        {
+            const guint8 *version_label;
+
+            proto_tree_add_item_ret_string(tree,
+                hf_isobus_vt_storeversion_versionlabel, tvb, offset, 7, ENC_ASCII|ENC_NA, wmem_packet_scope(), &version_label);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Store version under label %s", version_label);
+        }
+        else
+        {
+            guint32 error_codes;
+            offset += 4;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_storeversion_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Version label is not correct ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Insufficient memory available ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while storing version");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Version successfully stored");
+            }
+        }
+    }
+        break;
+    case VT_LOAD_VERSION:
+    {
+        if(direction == ecu_to_vt)
+        {
+            const guint8* version_label;
+
+            proto_tree_add_item_ret_string(tree,
+                hf_isobus_vt_loadversion_versionlabel, tvb, offset, 7, ENC_ASCII|ENC_NA, wmem_packet_scope(), &version_label);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Load version stored under label \"%s\"", version_label);
+        }
+        else
+        {
+            guint32 error_codes;
+            offset += 4;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_loadversion_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "File system error or pool data corruption ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Version label is not correct or Version label unknown ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Insufficient memory available ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while loading version");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Version successfully loaded");
+            }
+        }
+    }
+        break;
+    case VT_DELETE_VERSION:
+    {
+        if(direction == ecu_to_vt)
+        {
+            const guint8* version_label;
+
+            proto_tree_add_item_ret_string(tree,
+                hf_isobus_vt_deleteversion_versionlabel, tvb, offset, 7, ENC_ASCII|ENC_NA, wmem_packet_scope(), &version_label);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Delete version stored under label \"%s\"", version_label);
+        }
+        else
+        {
+            guint32 error_codes;
+            offset += 4;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_deleteversion_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Version label is not correct or Version label unknown ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while deleting version");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Version successfully deleted");
+            }
+        }
+    }
+        break;
+    case VT_EXTENDED_GET_VERSIONS:
+    {
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Request a list of extended versions");
+        }
+        else
+        {
+            guint32 number_of_versions, i;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_extendedgetversions_numberofversions, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_versions);
+            offset += 1;
+
+            for(i = 0; i < number_of_versions; i++)
+            {
+                proto_tree_add_item(tree,
+                    hf_isobus_vt_extendedgetversions_versionlabel, tvb, offset, 32, ENC_ASCII|ENC_NA);
+                offset += 32;
+            }
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Extended versions received");
+        }
+    }
+        break;
+    case VT_EXTENDED_STORE_VERSION:
+    {
+        if(direction == ecu_to_vt)
+        {
+            const guint8* version_label;
+
+            proto_tree_add_item_ret_string(tree,
+                hf_isobus_vt_extendedstoreversion_versionlabel, tvb, offset, 32, ENC_ASCII|ENC_NA, wmem_packet_scope(), &version_label);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Store extended version under label \"%s\"", version_label);
+        }
+        else
+        {
+            guint32 error_codes;
+            offset += 4;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_extendedstoreversion_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Version label is not correct ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Insufficient memory available ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while storing extended version");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Extended version successfully stored");
+            }
+        }
+    }
+        break;
+    case VT_EXTENDED_LOAD_VERSION:
+    {
+        if(direction == ecu_to_vt)
+        {
+            const guint8* version_label;
+
+            proto_tree_add_item_ret_string(tree,
+                hf_isobus_vt_extendedloadversion_versionlabel, tvb, offset, 32, ENC_ASCII|ENC_NA, wmem_packet_scope(), &version_label);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Store extended version under label \"%s\"", version_label);
+        }
+        else
+        {
+            guint32 error_codes;
+            offset += 4;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_extendedloadversion_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x01)
+                proto_item_append_text(ti, "File system error or pool data corruption ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Version label is not correct or Version label unknown ");
+            if (error_codes & 0x04)
+                proto_item_append_text(ti, "Insufficient memory available ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while loading extended version");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Extended version successfully loaded");
+            }
+        }
+    }
+        break;
+    case VT_EXTENDED_DELETE_VERSION:
+    {
+        if(direction == ecu_to_vt)
+        {
+            const guint8* version_label;
+
+            proto_tree_add_item_ret_string(tree,
+                hf_isobus_vt_extendeddeleteversion_versionlabel, tvb, offset, 32, ENC_ASCII|ENC_NA, wmem_packet_scope(), &version_label);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Delete version stored under label %s", version_label);
+        }
+        else
+        {
+            guint32 error_codes;
+            offset += 4;
+
+            ti = proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_extendeddeleteversion_errorcodes, tvb, offset, 1, ENC_LITTLE_ENDIAN, &error_codes);
+            proto_item_append_text(ti, ": ");
+            if (error_codes & 0x02)
+                proto_item_append_text(ti, "Version label is not correct or Version label unknown ");
+            if (error_codes & 0x08)
+                proto_item_append_text(ti, "Any other error ");
+
+            if(error_codes)
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Error while deleting extended version");
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Extended version successfully deleted");
+            }
+        }
+    }
+        break;
+    case VT_GET_VERSIONS_MESSAGE:
+    {
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Extended version successfully deleted");
+        }
+        /*no else as this message can only be used from ecu to vt*/
+    }
+        break;
+    case VT_GET_VERSIONS_RESPONSE:
+    {
+        if(direction == vt_to_ecu)
+        {
+            guint32 number_of_versions, i;
+
+            proto_tree_add_item_ret_uint(tree,
+                hf_isobus_vt_getversions_numberofversions, tvb, offset, 1, ENC_LITTLE_ENDIAN, &number_of_versions);
+            offset += 1;
+
+            for(i = 0; i < number_of_versions; i++)
+            {
+                proto_tree_add_item(tree,
+                    hf_isobus_vt_getversions_versionlabel, tvb, offset, 7, ENC_ASCII|ENC_NA);
+                offset += 7;
+            }
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Versions received");
+        }
+        /*no else as this message can only be used from vt to ecu*/
+    }
+        break;
+    case VT_UNSUPPORTED_VT_FUNCTION:
+    {
+        guint32 unsupported_vt_function;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_unsupportedvtfunction_unsupportedvtfunction, tvb, offset, 1, ENC_LITTLE_ENDIAN, &unsupported_vt_function);
+
+        if(direction == ecu_to_vt)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "VT function %s (%u) is not supported by ECU",
+                val_to_str_ext(unsupported_vt_function, &vt_function_code_ext, "unknown"), unsupported_vt_function);
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "VT function %s (%u) is not supported by VT",
+                val_to_str_ext(unsupported_vt_function, &vt_function_code_ext, "unknown"), unsupported_vt_function);
+        }
+    }
+        break;
+    case VT_VT_STATUS:
+    {
+        proto_tree *ti_busycodes_subtree;
+        proto_item *busycodes_item;
+        guint32 working_set_master, object_id_data_mask, object_id_soft_key_mask;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtstatus_workingsetmaster, tvb, offset, 1, ENC_LITTLE_ENDIAN, &working_set_master);
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtstatus_objectiddatamask, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id_data_mask);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        proto_tree_add_item_ret_uint(tree,
+            hf_isobus_vt_vtstatus_objectidsoftkeymask, tvb, offset, 2, ENC_LITTLE_ENDIAN, &object_id_soft_key_mask);
+        ti = proto_tree_add_item(tree,
+            hf_isobus_vt_objectid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+        PROTO_ITEM_SET_HIDDEN(ti);
+        offset += 2;
+
+        busycodes_item = proto_tree_add_item(tree,
+            hf_isobus_vt_vtstatus_vtbusycodes, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+
+        ti_busycodes_subtree = proto_item_add_subtree(busycodes_item, ett_isobus_vt_vtstatus_busycodes_subtree);
+        proto_tree_add_item(ti_busycodes_subtree, hf_isobus_vt_vtstatus_vtbusycodes_updatingvisiblemask, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        proto_tree_add_item(ti_busycodes_subtree, hf_isobus_vt_vtstatus_vtbusycodes_savingdata, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        proto_tree_add_item(ti_busycodes_subtree, hf_isobus_vt_vtstatus_vtbusycodes_executingcommand, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        proto_tree_add_item(ti_busycodes_subtree, hf_isobus_vt_vtstatus_vtbusycodes_executingmacro, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        proto_tree_add_item(ti_busycodes_subtree, hf_isobus_vt_vtstatus_vtbusycodes_parsingobjectpool, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        proto_tree_add_item(ti_busycodes_subtree, hf_isobus_vt_vtstatus_vtbusycodes_auxcontrolsactive, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        proto_tree_add_item(ti_busycodes_subtree, hf_isobus_vt_vtstatus_vtbusycodes_outofmemory, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        offset += 1;
+
+        proto_tree_add_item(tree,
+            hf_isobus_vt_vtstatus_vtfunctioncodes, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+
+        col_append_fstr(pinfo->cinfo, COL_INFO, "Status: Current master is %d data mask is %s soft key mask is %s",
+        working_set_master, get_object_id_string(object_id_data_mask), get_object_id_string(object_id_soft_key_mask));
+    }
+        break;
+    case VT_WORKING_SET_MAINTENANCE:
+    {
+        guint8 bitmask = tvb_get_guint8(tvb, offset);
+        guint8 version = tvb_get_guint8(tvb, offset + 1);
+        if(version == 0xFF)
+        {
+            version = 2;
+        }
+        if(version > 3)
+        {
+            proto_tree_add_item(tree,
+                hf_isobus_vt_wrksetmain_bitmask, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+        }
+        offset += 1;
+
+        proto_tree_add_item(tree,
+            hf_isobus_vt_wrksetmain_version, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+
+        if(version > 3 && bitmask & 0x80)
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Initiate ");
+        }
+        col_append_fstr(pinfo->cinfo, COL_INFO, "Working Set Maintenance, VT version is %d",
+            version);
+
+        current_vt_version = version;
+    }
+        break;
+    }
+	return tvb_captured_length(tvb);
+}
+
+static int
+dissect_vt_to_ecu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
+{
+    (void)data;
+    return dissect_vt(tvb, pinfo, tree, vt_to_ecu);
+}
+
+static int
+dissect_ecu_to_vt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
+{
+    (void)data;
+    return dissect_vt(tvb, pinfo, tree, ecu_to_vt);
+}
+
+/*
+ * Simple "get a line" routine, copied from giop dissector who copied it from somewhere :)
+ *
+ */
+
+static int vt_getline(FILE *fp, gchar *line, int maxlen)
+{
+    if (fgets(line, maxlen, fp) == NULL)
+    {
+        return 0;
+    }
+    else
+    {
+        line[strcspn(line, "\n")] = '\0';
+        return (int)strlen(line);
+    }
+}
+
+
+static void read_object_id_file(void)
+{
+    gchar   buf[500];
+    guint16 item_count = 0;
+    FILE     *file;
+
+    if ((file = ws_fopen(object_id_translation, "r")) == NULL)
+    {
+        object_id_strings[0].value = 0;
+        object_id_strings[0].strptr = NULL;
+
+        return;
+    }
+
+    while ((vt_getline(file, buf, 500)) > 0)
+    {
+        gchar **split_string = g_strsplit(buf, ",", 2);
+
+        object_id_strings[item_count].value = (guint32)g_ascii_strtoll(split_string[0], NULL, 10);
+        object_id_strings[item_count].strptr = wmem_strdup(wmem_epan_scope(), split_string[1]);
+
+        item_count++;
+    }
+
+    object_id_strings[item_count].value = 0;
+    object_id_strings[item_count].strptr = NULL;
+}
+
+static void isobus_vt_init(void)
+{
+    read_object_id_file();
+}
+
+/* Register the protocol with Wireshark */
+void
+proto_register_isobus_vt(void)
+{
+    static hf_register_info hf[] = {
+        { &hf_isobus_vt,
+          { "VT",                       "isobus.vt",
+            FT_NONE, BASE_NONE, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_command,
+          { "Command",                  "isobus.vt.command",
+            FT_UINT8, BASE_DEC | BASE_EXT_STRING, &vt_function_code_ext, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_objectid,
+          { "Object ID",                "isobus.vt.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_softkey_keyactcode,
+          { "Activation Code",          "isobus.vt.soft_key.act_code",
+            FT_UINT8, BASE_DEC, VALS(key_activation_codes), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_softkey_objectid,
+          { "Object ID",                "isobus.vt.soft_key.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_softkey_parentobjectid,
+          { "Parent Object ID",         "isobus.vt.soft_key.parent_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_softkey_keynumber,
+          { "Key Number",               "isobus.vt.soft_key.key_number",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_button_keyactcode,
+          { "Activation Code",          "isobus.vt.button.act_code",
+            FT_UINT8, BASE_DEC, VALS(button_activation_codes), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_button_objectid,
+          { "Object ID",                "isobus.vt.button.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_button_parentobjectid,
+          { "Parent Object ID",         "isobus.vt.button.parent_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_button_keynumber,
+          { "Key Number",               "isobus.vt.button.key_number",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_pointing_xposition,
+          { "X Position",               "isobus.vt.pointing_event.x_position",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_pointing_yposition,
+          { "Y Position",               "isobus.vt.pointing_event.y_position",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_pointing_touchstate,
+          { "Touch State",              "isobus.vt.pointing_event.touch_state",
+            FT_UINT8, BASE_DEC, VALS(pointing_touch_state), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtselectinputobject_objectid,
+          { "Object ID",                "isobus.vt.vt_select_input_object.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtselectinputobject_selection,
+          { "Selection",                "isobus.vt.vt_select_input_object.selection",
+            FT_UINT8, BASE_DEC, VALS(selection), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtselectinputobject_openforinput,
+          { "Bitmask",                  "isobus.vt.vt_select_input_object.open_for_input",
+            FT_UINT8, BASE_DEC, NULL, 0x80,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtescmessage_objectid,
+          { "Object ID",                "isobus.vt.vt_esc_message.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtescmessage_errorcodes,
+          { "Error Codes",              "isobus.vt.vt_esc_message.error_codes",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtchgnumval_objectid,
+          { "Object ID",                "isobus.vt.vt_chg_num_val.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtchgnumval_value,
+          { "Value",                    "isobus.vt.vt_chg_num_val.val",
+            FT_UINT32, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtchgactivemask_maskobjectid,
+          { "Mask Object ID",           "isobus.vt.vt_chg_active_mask.mask_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtchgactivemask_errorcodes,
+          { "Error Codes",                "isobus.vt.vt_chg_active_mask.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtchgactivemask_errorobjectid,
+          { "Error Object ID",          "isobus.vt.vt_chg_active_mask.error_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtchgactivemask_errorobjectidparent,
+          { "Error Object ID Parent",   "isobus.vt.vt_chg_active_mask.error_object_id_parent",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtchgstrval_objectid,
+          { "Object ID",                "isobus.vt.vt_chg_str_val.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtchgstrval_length,
+          { "Length",                   "isobus.vt.vt_chg_str_val.length",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtchgstrval_value,
+          { "Value",                    "isobus.vt.vt_chg_str_val.val",
+            FT_STRING, STR_UNICODE, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtonuserlayouthideshow_objectid_1,
+          { "Object ID 1",                 "isobus.vt.vt_on_user_layout_hide_show.object_id_1",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtonuserlayouthideshow_status_1,
+          { "Status 1",                    "isobus.vt.vt_on_user_layout_hide_show.status_1",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtonuserlayouthideshow_objectid_2,
+          { "Object ID 2",                 "isobus.vt.vt_on_user_layout_hide_show.object_id_2",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtonuserlayouthideshow_status_2,
+          { "Status 2",                    "isobus.vt.vt_on_user_layout_hide_show.status_2",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtcontrolaudiosignaltermination_terminationcause,
+          { "Termination Cause",           "isobus.vt.vt_control_audio_signal_termination.termination_cause",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_endofobjectpool_errorcodes,
+          { "Error Codes",                 "isobus.vt.end_of_object_pool.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_endofobjectpool_faultyparentobjectid,
+          { "Faulty Parent Object ID",     "isobus.vt.end_of_object_pool.faulty_parent_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_endofobjectpool_faultyobjectid,
+          { "Faulty Object ID",            "isobus.vt.end_of_object_pool.faulty_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_endofobjectpool_objectpoolerrorcodes,
+          { "Object Pool Error Codes",     "isobus.vt.end_of_object_pool.object_pool_error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryassignmenttype1_sourceaddressauxinputdevice,
+          { "Source Address Auxiliary Input Device", "isobus.vt.auxiliary_assignment_type_1.source_address_aux_input_device",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryassignmenttype1_auxinputnumber,
+          { "Auxiliary Input Number",   "isobus.vt.auxiliary_assignment_type_1.aux_input_number",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryassignmenttype1_objectidauxinputdevice,
+          { "Object ID of Auxiliary Function",                "isobus.vt.auxiliary_assignment_type_1.object_id_of_auxiliary_function",
+            FT_UINT16, BASE_DEC_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype1status_inputnumber,
+          { "Input Number",             "isobus.vt.auxiliary_input_type_1_status.input_number",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype1status_analyzevalue,
+          { "Analyze Value",             "isobus.vt.auxiliary_input_type_1_status.analyze_value",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype1status_numberoftransitions,
+          { "Number of transitions",     "isobus.vt.auxiliary_input_type_1_status.number_of_transitions",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype1status_booleanvalue,
+          { "Boolean Value",             "isobus.vt.auxiliary_input_type_1_status.boolean_value",
+            FT_UINT8, BASE_DEC, VALS(auxiliary_boolean_value), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_preferredassignment_numberofinputunits,
+          { "Number of Input Units",             "isobus.vt.preferred_assignment.number_of_input_units",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_preferredassignment_auxinputunit_name,
+          { "64-bit NAME of the Auxiliary Input Unit", "isobus.vt.preferred_assignment.auxiliary_input_unit.name",
+            FT_UINT64, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_preferredassignment_auxinputunit_modelidentificationcode,
+          { "Model Identification Code of the Auxiliary Input Unit", "isobus.vt.preferred_assignment.auxiliary_input_unit.model_identification_code",
+            FT_UINT16, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_preferredassignment_auxinputunit_numberofpreferredfunctions,
+          { "Number of Preferred Functions for this Auxiliary Input Unit", "isobus.vt.preferred_assignment.auxiliary_input_unit.number_of_preferred_functions",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_preferredassignment_auxinputunit_preferredfunctions_auxfunctionobjectid,
+          { "Object ID of Auxiliary Function", "isobus.vt.preferred_assignment.auxiliary_input_unit.preferred_functions.auxiliary_function_object_id",
+            FT_UINT16, BASE_HEX_DEC, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_preferredassignment_auxinputunit_preferredfunctions_auxinputobjectid,
+          { "Object ID of Auxiliary Input", "isobus.vt.preferred_assignment.auxiliary_input_unit.preferred_functions.auxiliary_input_object_id",
+            FT_UINT16, BASE_HEX_DEC, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_preferredassignment_errorcodes,
+          { "Error Codes", "isobus.vt.preferred_assignment.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_preferredassignment_faultyauxiliaryfunctionobjectid,
+          { "Faulty Auxiliary Function Object ID", "isobus.vt.preferred_assignment.faulty_auxiliary_function_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype2maintenance_modelidentificationcode,
+          { "Model Identification Code", "isobus.vt.auxiliary_input_type_2_maintenance.model_identification_code",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype2maintenance_status,
+          { "Status", "isobus.vt.auxiliary_input_type_2_maintenance.status",
+            FT_UINT8, BASE_DEC, VALS(auxiliary_maintenance_status), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryassignmenttype2_name,
+          { "64-bit NAME of the Auxiliary Input Unit", "isobus.vt.auxiliary_assignment_type_2.name",
+            FT_UINT64, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryassignmenttype2_flags,
+          { "Flags", "isobus.vt.auxiliary_assignment_type_2.flags",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryassignmenttype2_flags_preferredassignment,
+          { "Preferred Assignment", "isobus.vt.auxiliary_assignment_type_2.flags.preferred_assignment",
+            FT_UINT8, BASE_HEX, NULL, 0x80,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryassignmenttype2_flags_auxiliaryfunctiontype,
+          { "Auxiliary Function Type", "isobus.vt.auxiliary_assignment_type_2.flags.auxiliary_function_type",
+            FT_UINT8, BASE_DEC, NULL, 0x1F,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryassignmenttype2_auxinputobjectid,
+          { "Object ID of the Auxiliary Input", "isobus.vt.auxiliary_assignment_type_2.auxiliary_input_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryassignmenttype2_auxfunctionobjectid,
+          { "Object ID of Auxiliary Function", "isobus.vt.auxiliary_assignment_type_2.auxiliary_function_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryassignmenttype2_errorcodes,
+          { "Error Codes", "isobus.vt.auxiliary_assignment_type_2.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputstatustype2enable_auxiliaryinputobjectid,
+          { "Auxiliary Input Object ID", "isobus.vt.auxiliary_input_status_type_2_enable.auxiliary_input_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputstatustype2enable_enable,
+          { "Enable", "isobus.vt.auxiliary_input_status_type_2_enable.enable",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputstatustype2enable_status,
+          { "Status", "isobus.vt.auxiliary_input_status_type_2_enable.status",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputstatustype2enable_errorcodes,
+          { "Error Codes", "isobus.vt.auxiliary_input_status_type_2_enable.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype2status_auxiliaryinputobjectid,
+          { "Auxiliary Input Object ID", "isobus.vt.auxiliary_input_type_2_status.auxiliary_input_object_id",
+            FT_UINT8, BASE_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype2status_value1,
+          { "Value 1", "isobus.vt.auxiliary_input_type_2_status.value_1",
+            FT_UINT16, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype2status_value2,
+          { "Value 2", "isobus.vt.auxiliary_input_type_2_status.value_2",
+            FT_UINT16, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype2status_operatingstate,
+          { "Operating State", "isobus.vt.auxiliary_input_type_2_status.operating_state",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype2status_operatingstate_learnmodeactive,
+          { "Operating State", "isobus.vt.auxiliary_input_type_2_status.operating_state.learn_mode_active",
+            FT_UINT8, BASE_HEX, NULL, 0x01,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliaryinputtype2status_operatingstate_inputactivatedinlearnmode,
+          { "Input activated in learn mode", "isobus.vt.auxiliary_input_type_2_status.operating_state.input_activated_in_learn_mode",
+            FT_UINT8, BASE_HEX, NULL, 0x02,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliarycapabilities_requesttype,
+          { "Request Type", "isobus.vt.auxiliary_capabilities.request_type",
+            FT_UINT8, BASE_DEC, VALS(auxiliary_capabilities_request_type), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliarycapabilities_numberofauxiliaryunits,
+          { "Number of Auxiliary Unit", "isobus.vt.auxiliary_capabilities.number_of_auxiliary_units",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_name,
+          { "64-bit NAME of the Auxiliary Unit", "isobus.vt.auxiliary_capabilities.auxiliary_unit.name",
+            FT_UINT64, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_numberofdifferentsets,
+          { "Number of different sets for this Auxiliary Unit", "isobus.vt.auxiliary_capabilities.auxiliary_unit.number_of_different_sets",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_set_numberofinstances,
+          { "Number of Instances", "isobus.vt.auxiliary_capabilities.auxiliary_unit.set.number_of_instances",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_set_functionattribute,
+          { "Function attribute", "isobus.vt.auxiliary_capabilities.auxiliary_unit.set.function_attribute",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_auxiliarycapabilities_auxiliaryunit_set_assignedattribute,
+          { "Assigned attribute", "isobus.vt.auxiliary_capabilities.auxiliary_unit.set.assigned_attribute",
+            FT_UINT8, BASE_HEX, VALS(auxiliary_assigned_attributes), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_esc_objectid,
+          { "Object ID", "isobus.vt.esc.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_esc_errorcodes,
+          { "Error Codes", "isobus.vt.esc.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_hideshowobj_objectid,
+          { "Object ID", "isobus.vt.hide_show_object.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_hideshowobj_action,
+          { "Action", "isobus.vt.hide_show_object.action",
+            FT_UINT8, BASE_DEC, VALS(vt_hide_show_action), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_hideshowobj_errorcodes,
+          { "Error Codes", "isobus.vt.hide_show_object.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_enabledisableobj_objectid,
+          { "Object ID", "isobus.vt.enable_disable_object.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_enabledisableobj_enabledisable,
+          { "Action",                   "isobus.vt.enable_disable_object.enable_disable",
+            FT_UINT8, BASE_DEC, VALS(vt_enable_disable_action), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_enabledisableobj_errorcodes,
+          { "Error Codes",              "isobus.vt.enable_disable_object.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_selectinputobject_objectid,
+          { "Object ID",                "isobus.vt.select_input_object.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_selectinputobject_option,
+          { "Option",                "isobus.vt.select_input_object.option",
+            FT_UINT8, BASE_HEX, VALS(select_input_object_option), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_selectinputobject_response,
+          { "Response",                "isobus.vt.select_input_object.response",
+            FT_UINT16, BASE_DEC_HEX, VALS(select_input_opject_response), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_selectinputobject_errorcodes,
+          { "Object ID", "isobus.vt.select_input_object.error_codes",
+            FT_UINT16, BASE_DEC_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_controlaudiosignal_activations,
+          { "Activations", "isobus.vt.control_audio_signal.activations",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_controlaudiosignal_frequency,
+          { "Frequency", "isobus.vt.control_audio_signal.frequency",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_controlaudiosignal_ontime,
+          { "On-time duration", "isobus.vt.control_audio_signal.on_time",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_controlaudiosignal_offtime,
+          { "Off-time duration", "isobus.vt.control_audio_signal.off_time",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_controlaudiosignal_errorcodes,
+          { "Error Codes", "isobus.vt.control_audio_signal.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_setaudiovolume_volume,
+          { "Volume", "isobus.vt.set_audio_volume.volume",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_setaudiovolume_errorcodes,
+          { "Error Codes", "isobus.vt.set_audio_volume.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changechildlocation_parentobjectid,
+          { "Parent Object ID", "isobus.vt.change_child_location.parent_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changechildlocation_objectid,
+          { "Object ID", "isobus.vt.change_child_location.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changechildlocation_relativexpos,
+          { "Relative X Position", "isobus.vt.change_child_location.relative_x_position",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changechildlocation_relativeypos,
+          { "Relative Y Position", "isobus.vt.change_child_location.relative_y_position",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changechildlocation_errorcodes,
+          { "Errorcode", "isobus.vt.change_child_location.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changechildposition_parentobjectid,
+          { "Parent Object ID", "isobus.vt.chg_child_pos.parent_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changechildposition_objectid,
+          { "Object ID", "isobus.vt.chg_child_pos.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changechildposition_xpos,
+          { "Relative X Position", "isobus.vt.chg_child_pos.rel_x_pos",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changechildposition_ypos,
+          { "Relative Y Position", "isobus.vt.chg_child_pos.rel_y_pos",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changechildposition_errorcodes,
+          { "Error codes", "isobus.vt.chg_child_pos.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changesize_objectid,
+          { "Object ID", "isobus.vt.change_size.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changesize_newwidth,
+          { "New Width", "isobus.vt.change_size.new_width",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changesize_newheight,
+          { "New Height", "isobus.vt.change_size.new_height",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changesize_errorcodes,
+          { "Errorcode", "isobus.vt.change_size.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_chgnumval_objectid,
+          { "Object ID", "isobus.vt.change_numeric_value.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_chgnumval_errorcodes,
+          { "Error Codes", "isobus.vt.change_numeric_value.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_chgnumval_value,
+          { "Value", "isobus.vt.change_numeric_value.val",
+            FT_UINT32, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeendpoint_objectid,
+          { "Object ID", "isobus.vt.change_end_point.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeendpoint_width,
+          { "Width", "isobus.vt.change_end_point.width",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeendpoint_height,
+          { "Height", "isobus.vt.change_end_point.height",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeendpoint_linedirection,
+          { "Line Direction", "isobus.vt.change_end_point.line_direction",
+            FT_UINT8, BASE_DEC, VALS(line_direction), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefontattributes_objectid,
+          { "Object ID", "isobus.vt.change_font_attributes.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefontattributes_fontcolour,
+          { "Font Colour", "isobus.vt.change_font_attributes.font_colour",
+            FT_UINT8, BASE_DEC | BASE_RANGE_STRING, RVALS(vt_colours), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefontattributes_fontsize,
+          { "Font Size", "isobus.vt.change_font_attributes.font_size",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefontattributes_fonttype,
+          { "Font Type", "isobus.vt.change_font_attributes.font_type",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefontattributes_fontstyle,
+          { "Font Style", "isobus.vt.change_font_attributes.font_style",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefontattributes_errorcodes,
+          { "Error Codes", "isobus.vt.change_font_attributes.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changelineattributes_objectid,
+          { "Object ID", "isobus.vt.change_line_attributes.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changelineattributes_linecolour,
+          { "Line Colour", "isobus.vt.change_line_attributes.line_colour",
+            FT_UINT8, BASE_DEC | BASE_RANGE_STRING, RVALS(vt_colours), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changelineattributes_linewidth,
+          { "Line Width", "isobus.vt.change_line_attributes.line_width",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changelineattributes_lineart,
+          { "Line Art", "isobus.vt.change_line_attributes.line_art",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changelineattributes_errorcodes,
+          { "Error Codes", "isobus.vt.change_line_attributes.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefillattributes_objectid,
+          { "Object ID", "isobus.vt.change_fill_attributes.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefillattributes_filltype,
+          { "Fill Type", "isobus.vt.change_fill_attributes.fill_type",
+            FT_UINT8, BASE_DEC | BASE_RANGE_STRING, RVALS(vt_colours), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefillattributes_fillcolour,
+          { "Fill Colour", "isobus.vt.change_fill_attributes.fill_colour",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefillattributes_fillpatternobjectid,
+          { "Fill Pattern Object ID", "isobus.vt.change_fill_attributes.fill_pattern_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changefillattributes_errorcodes,
+          { "Error Codes", "isobus.vt.change_fill_attributes.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeactivemask_workingset,
+          { "Working Set Object ID", "isobus.vt.chg_active_mask.working_set_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeactivemask_newactivemask,
+          { "New Active Mask Object ID", "isobus.vt.chg_active_mask.new_active_mask_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeactivemask_errorcodes,
+          { "Error Codes", "isobus.vt.chg_active_mask.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changesoftkeymask_masktype,
+          { "Mask Type", "isobus.vt.change_soft_key_mask.mask_type",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changesoftkeymask_datamaskobjectid,
+          { "Working Set Object ID", "isobus.vt.change_soft_key_mask.data_mask_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changesoftkeymask_newsoftkeymaskobjectid,
+          { "New Active Mask Object ID", "isobus.vt.change_soft_key_mask.new_soft_key_mask_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changesoftkeymask_errorcodes,
+          { "Error Codes", "isobus.vt.change_soft_key_mask.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeattributes_objectid,
+          { "Object ID", "isobus.vt.change_attributes.object_id",
+            FT_UINT16, BASE_DEC, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeattributes_attributeid,
+          { "Attribute ID", "isobus.vt.change_attributes.attribute_id",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeattributes_newvalue,
+          { "New Value For Attribute", "isobus.vt.change_attributes.new_active_mask",
+            FT_UINT32, BASE_DEC_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeattributes_errorcodes,
+          { "Error Codes", "isobus.vt.change_attributes.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepriority_objectid,
+          { "Object ID", "isobus.vt.change_priority.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepriority_newpriority,
+          { "New Priority", "isobus.vt.change_priority.new_priority",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepriority_errorcodes,
+          { "Error Codes", "isobus.vt.change_priority.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changelistitem_listobjectid,
+          { "List Object ID", "isobus.vt.change_list_item.list_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changelistitem_listindex,
+          { "List Index", "isobus.vt.change_list_item.list_index",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changelistitem_newobjectid,
+          { "New Object ID", "isobus.vt.change_list_item.new_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changelistitem_errorcodes,
+          { "Error Codes", "isobus.vt.change_list_item.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_deleteobjectpool_errorcodes,
+          { "Error Codes", "isobus.vt.delete_object_pool.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_chgstrval_objectid,
+          { "Object ID", "isobus.vt.change_string_value.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_chgstrval_length,
+          { "Length", "isobus.vt.change_string_value.length",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_chgstrval_errorcodes,
+          { "Error Codes", "isobus.vt.change_string_value.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_chgstrval_value,
+          { "Value", "isobus.vt.change_string_value.value",
+            FT_STRING, STR_UNICODE, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changebackgroundcolour_objectid,
+          { "Object ID", "isobus.vt.change_background_colour.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changebackgroundcolour_errorcodes,
+          { "Error Codes", "isobus.vt.change_background_colour.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changebackgroundcolour_colour,
+          { "Colour", "isobus.vt.change_background_colour.colour",
+            FT_UINT8, BASE_DEC | BASE_RANGE_STRING, RVALS(vt_colours), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeobjectlabel_objectid,
+          { "Object ID", "isobus.vt.change_object_label.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeobjectlabel_stringobjectid,
+          { "String Object ID", "isobus.vt.change_object_label.string_object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeobjectlabel_fonttype,
+          { "Colour", "isobus.vt.change_object_label.colour",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeobjectlabel_graphicobjectid,
+          { "Graphics Representation Object ID", "isobus.vt.change_object_label.graphic_representation_object_id",
+            FT_UINT16, BASE_DEC, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changeobjectlabel_errorcodes,
+          { "Error Codes", "isobus.vt.change_object_label.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepolygonpoint_objectid,
+          { "Object ID", "isobus.vt.change_polygon_point.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepolygonpoint_pointindex,
+          { "Point Index", "isobus.vt.change_polygon_point.point_index",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepolygonpoint_xvalue,
+          { "X Value", "isobus.vt.change_polygon_point.x_value",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepolygonpoint_yvalue,
+          { "Y Value", "isobus.vt.change_polygon_point.y_value",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepolygonpoint_errorcodes,
+          { "Error Codes", "isobus.vt.change_polygon_point.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepolygonscale_objectid,
+          { "Object ID", "isobus.vt.change_polygon_scale.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepolygonscale_newwidth,
+          { "New Width", "isobus.vt.change_polygon_scale.new_width",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepolygonscale_newheight,
+          { "New Height", "isobus.vt.change_polygon_scale.new_height",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_changepolygonscale_errorcodes,
+          { "Error Codes", "isobus.vt.change_polygon_scale.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_objectid,
+          { "Object ID", "isobus.vt.graphics_context.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_subcommandid,
+          { "Sub Command ID", "isobus.vt.graphics_context.sub_command_id",
+            FT_UINT8, BASE_DEC | BASE_EXT_STRING, &graphics_context_sub_command_id_ext, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_setgraphicscursor_xposition,
+          { "X Position", "isobus.vt.graphics_context.set_graphics_cursor.x_position",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_setgraphicscursor_yposition,
+          { "Y Position", "isobus.vt.graphics_context.set_graphics_cursor.y_position",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_movegraphicscursor_xoffset,
+          { "X Offset", "isobus.vt.graphics_context.move_graphics_cursor.x_offset",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_movegraphicscursor_yoffset,
+          { "Y Offset", "isobus.vt.graphics_context.move_graphics_cursor.y_offset",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_setforegroundcolour_colour,
+          { "Colour", "isobus.vt.graphics_context.set_foreground_colour.colour",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_setbackgroundcolour_colour,
+          { "Colour", "isobus.vt.graphics_context.set_background_colour.colour",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_setlineattributesobjectid_objectid,
+          { "Object ID", "isobus.vt.graphics_context.set_line_attributes_object_id.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_setfillattributesobjectid_objectid,
+          { "Object ID", "isobus.vt.graphics_context.set_fill_attributes_object_id.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_setfontattributesobjectid_objectid,
+          { "Object ID", "isobus.vt.graphics_context.set_font_attributes_object_id.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_eraserectangle_width,
+          { "Width", "isobus.vt.graphics_context.erase_rectangle.width",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_eraserectangle_height,
+          { "Height", "isobus.vt.graphics_context.erase_rectangle.height",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawpoint_xoffset,
+          { "X Offset", "isobus.vt.graphics_context.draw_point.x_offset",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawpoint_yoffset,
+          { "Y Offset", "isobus.vt.graphics_context.draw_point.y_offset",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawline_xoffset,
+          { "X Offset", "isobus.vt.graphics_context.draw_line.x_offset",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawline_yoffset,
+          { "Y Offset", "isobus.vt.graphics_context.draw_line.y_offset",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawrectangle_width,
+          { "Width", "isobus.vt.graphics_context.draw_rectangle.width",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawrectangle_height,
+          { "Height", "isobus.vt.graphics_context.draw_rectangle.height",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawclosedellipse_width,
+          { "Width", "isobus.vt.graphics_context.draw_closed_rectangle.width",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawclosedellipse_height,
+          { "Height", "isobus.vt.graphics_context.draw_closed_rectangle.height",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawpolygon_numberofpoints,
+          { "Number of polygon points", "isobus.vt.graphics_context.draw_polygon.number_of_points",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawpolygon_point_xoffset,
+          { "X Offset", "isobus.vt.graphics_context.draw_polygon.point.x_offset",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawpolygon_point_yoffset,
+          { "Y Offset", "isobus.vt.graphics_context.draw_polygon.point.y_offset",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawtext_background,
+          { "Background", "isobus.vt.graphics_context.draw_text.point.background",
+            FT_UINT8, BASE_DEC, VALS(draw_text_background), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawtext_numberofbytes,
+          { "Number of Bytes", "isobus.vt.graphics_context.draw_text.point.number_of_bytes",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawtext_textstring,
+          { "Text string", "isobus.vt.graphics_context.draw_text.point.text_string",
+            FT_STRING, STR_UNICODE, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_panviewport_viewportx,
+          { "Viewport X", "isobus.vt.graphics_context.pan_viewport.viewport_x",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_panviewport_viewporty,
+          { "Viewport Y", "isobus.vt.graphics_context.pan_viewport.viewport_y",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_zoomviewport_zoomvalue,
+          { "Zoom Value", "isobus.vt.graphics_context.zoom_viewport.zoom_value",
+            FT_FLOAT, BASE_NONE, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_panandzoomviewport_viewportx,
+          { "Viewport X", "isobus.vt.graphics_context.pan_and_zoom_viewport.viewport_x",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_panandzoomviewport_viewporty,
+          { "Viewport Y", "isobus.vt.graphics_context.pan_and_zoom_viewport.viewport_y",
+            FT_INT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_panandzoomviewport_zoomvalue,
+          { "Zoom Value", "isobus.vt.graphics_context.pan_and_zoom_viewport.zoom_value",
+            FT_FLOAT, BASE_NONE, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_changeviewportsize_newwidth,
+          { "New Width", "isobus.vt.graphics_context.change_viewport_size.new_width",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_changeviewportsize_newheight,
+          { "New Height", "isobus.vt.graphics_context.change_viewport_size.new_height",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_drawvtobject_objectid,
+          { "Object ID", "isobus.vt.graphics_context.draw_vt_object.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_copycanvastopicturegraphic_objectidpicturegraphic,
+          { "Object ID of Picture Grahpic", "isobus.vt.graphics_context.copy_canvas_to_picture_graphic.object_id_picture_graphic",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_graphicscontext_copyviewporttopicturegraphic_objectidpicturegraphic,
+          { "Object ID of Picture Grahpic", "isobus.vt.graphics_context.copy_viewport_to_picture_graphic.object_id_picture_graphic",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getattributevalue_objectid,
+          { "Object ID", "isobus.vt.get_attribute_value.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getattributevalue_attributeid,
+          { "Attribute ID", "isobus.vt.get_attribute_value.attribute_id",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getattributevalue_value,
+          { "Value", "isobus.vt.get_attribute_value.value",
+            FT_UINT32, BASE_DEC_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getattributevalue_errorcodes,
+          { "Error Codes", "isobus.vt.get_attribute_value.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_selectcolourmap_objectid,
+          { "Object ID", "isobus.vt.select_colour_map.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_selectcolourmap_errorcodes,
+          { "Error Codes", "isobus.vt.select_colour_map.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_executeextendedmacro_objectid,
+          { "Object ID", "isobus.vt.execute_extended_macro.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_executeextendedmacro_errorcodes,
+          { "Error Codes", "isobus.vt.execute_extended_macro.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_lockunlockmask_command,
+          { "Command", "isobus.vt.lock_unlock_mask.command",
+            FT_UINT8, BASE_DEC, VALS(lock_unlock), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_lockunlockmask_objectid,
+          { "Object ID", "isobus.vt.lock_unlock_mask.object_id",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_lockunlockmask_locktimeout,
+          { "Lock Timeout", "isobus.vt.lock_unlock_mask.lock_timeout",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_lockunlockmask_errorcodes,
+          { "Error Codes", "isobus.vt.lock_unlock_mask.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_executemacro_objectid,
+          { "Object ID", "isobus.vt.execute_macro.object_id",
+            FT_UINT8, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_executemacro_errorcodes,
+          { "Error Codes", "isobus.vt.execute_macro.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getmemory_memoryrequired,
+          { "Memory Required", "isobus.vt.get_memory.memory_required",
+            FT_UINT32, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getmemory_vtversion,
+          { "VT Version", "isobus.vt.get_memory.vt_version",
+            FT_UINT8, BASE_DEC, VALS(vt_versions_extended), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getmemory_status,
+          { "Status", "isobus.vt.get_memory.status",
+            FT_UINT8, BASE_DEC, VALS(memory_status), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getsupportedwidechars_codeplane,
+          { "Code Plane", "isobus.vt.get_supported_widechars.code_plane",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getsupportedwidechars_firstwidechar,
+          { "First Widechar", "isobus.vt.get_supported_widechars.first_widechar",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getsupportedwidechars_lastwidechar,
+          { "Last Widechar", "isobus.vt.get_supported_widechars.last_widechar",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getsupportedwidechars_errorcodes,
+          { "Error Codes", "isobus.vt.get_supported_widechars.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getsupportedwidechars_numberofranges,
+          { "Number of Ranges", "isobus.vt.get_supported_widechars.number_of_ranges",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getsupportedwidechars_firstavailablewidechar,
+          { "First Available Widechar", "isobus.vt.get_supported_widechars.first_available_widechar",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getsupportedwidechars_lastavailablewidechar,
+          { "Last Available Widechar", "isobus.vt.get_supported_widechars.last_available_widechar",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getnumberofsoftkeys_navigationsoftkeys,
+          { "Navigation Soft Keys", "isobus.vt.get_number_of_soft_keys.navigation_soft_keys",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getnumberofsoftkeys_xdots,
+          { "X Dots", "isobus.vt.get_number_of_soft_keys.x_dots",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getnumberofsoftkeys_ydots,
+          { "Y Dots", "isobus.vt.get_number_of_soft_keys.y_dots",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getnumberofsoftkeys_virtualsoftkeys,
+          { "Virtual Soft Keys", "isobus.vt.get_number_of_soft_keys.virtual_soft_keys",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getnumberofsoftkeys_physicalsoftkeys,
+          { "Physical Soft Keys", "isobus.vt.get_number_of_soft_keys.physical_soft_keys",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_smallfontsizes,
+          { "Small Font Sizes", "isobus.vt.get_text_font_data.small_font_sizes",
+            FT_UINT8, BASE_HEX, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_smallfontsizes_font8x8,
+          { "Font 8 x 8",       "isobus.vt.get_text_font_data.small_font_sizes.font_8x8",
+            FT_UINT8, BASE_HEX, NULL, 0x01,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_smallfontsizes_font8x12,
+          { "Font 8 x 12",       "isobus.vt.get_text_font_data.small_font_sizes.font_8x12",
+            FT_UINT8, BASE_HEX, NULL, 0x02,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_smallfontsizes_font12x16,
+          { "Font 12 x 16",       "isobus.vt.get_text_font_data.small_font_sizes.font_12x16",
+            FT_UINT8, BASE_HEX, NULL, 0x04,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_smallfontsizes_font16x16,
+          { "Font 12 x 16",       "isobus.vt.get_text_font_data.small_font_sizes.font_12x16",
+            FT_UINT8, BASE_HEX, NULL, 0x08,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_smallfontsizes_font16x24,
+          { "Font 16 x 24",       "isobus.vt.get_text_font_data.small_font_sizes.font_16x24",
+            FT_UINT8, BASE_HEX, NULL, 0x10,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_smallfontsizes_font24x32,
+          { "Font 24 x 32",       "isobus.vt.get_text_font_data.small_font_sizes.font_24x32",
+            FT_UINT8, BASE_HEX, NULL, 0x20,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_smallfontsizes_font32x32,
+          { "Font 32 x 32",       "isobus.vt.get_text_font_data.small_font_sizes.font_32x32",
+            FT_UINT8, BASE_HEX, NULL, 0x40,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_largefontsizes,
+          { "Large Font Sizes",       "isobus.vt.get_text_font_data.large_font_sizes",
+            FT_UINT8, BASE_HEX, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_largefontsizes_font32x48,
+          { "Font 32 x 48",       "isobus.vt.get_text_font_data.large_font_sizes.font_32x48",
+            FT_UINT8, BASE_HEX, NULL, 0x01,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_largefontsizes_font48x64,
+          { "Font 48 x 64",       "isobus.vt.get_text_font_data.large_font_sizes.font_48x64",
+            FT_UINT8, BASE_HEX, NULL, 0x02,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_largefontsizes_font64x64,
+          { "Font 64 x 64",       "isobus.vt.get_text_font_data.large_font_sizes.font_64x64",
+            FT_UINT8, BASE_HEX, NULL, 0x04,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_largefontsizes_font64x96,
+          { "Font 64 x 96",       "isobus.vt.get_text_font_data.large_font_sizes.font_64x96",
+            FT_UINT8, BASE_HEX, NULL, 0x08,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_largefontsizes_font96x128,
+          { "Font 96 x 128",       "isobus.vt.get_text_font_data.large_font_sizes.font_96x128",
+            FT_UINT8, BASE_HEX, NULL, 0x10,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_largefontsizes_font128x128,
+          { "Font 128 x 128",       "isobus.vt.get_text_font_data.large_font_sizes.font_128x128",
+            FT_UINT8, BASE_HEX, NULL, 0x20,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_largefontsizes_font128x192,
+          { "Font 128 x 192",       "isobus.vt.get_text_font_data.large_font_sizes.font_128x192",
+            FT_UINT8, BASE_HEX, NULL, 0x40,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_typeattributes,
+          { "Type Attributes",       "isobus.vt.get_text_font_data.type_attributes",
+            FT_UINT8, BASE_HEX, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_typeattributes_boldtext,
+          { "Bold text",       "isobus.vt.get_text_font_data.type_attributes.bold_text",
+            FT_UINT8, BASE_HEX, NULL, 0x01,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_typeattributes_crossedouttext,
+          { "Crossed out text",       "isobus.vt.get_text_font_data.type_attributes.crossed_out_text",
+            FT_UINT8, BASE_HEX, NULL, 0x02,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_typeattributes_underlinedtext,
+          { "Underlined text",       "isobus.vt.get_text_font_data.type_attributes.underlined_text",
+            FT_UINT8, BASE_HEX, NULL, 0x04,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_typeattributes_italicstext,
+          { "Italics text",       "isobus.vt.get_text_font_data.type_attributes.italics_text",
+            FT_UINT8, BASE_HEX, NULL, 0x08,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_typeattributes_invertedtext,
+          { "Inverted text",       "isobus.vt.get_text_font_data.type_attributes.inverted_text",
+            FT_UINT8, BASE_HEX, NULL, 0x10,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_typeattributes_flashinverted,
+          { "Flash inverted",       "isobus.vt.get_text_font_data.type_attributes.flash_inverted",
+            FT_UINT8, BASE_HEX, NULL, 0x20,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_typeattributes_flashhidden,
+          { "Flash hidden",       "isobus.vt.get_text_font_data.type_attributes.flash_hidden",
+            FT_UINT8, BASE_HEX, NULL, 0x40,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gettextfontdata_typeattributes_proportionalfontrendering,
+          { "Proportional font rendering",       "isobus.vt.get_text_font_data.type_attributes.proportional_font_rendering",
+            FT_UINT8, BASE_DEC, NULL, 0x40,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getwindowmaskdata_backgroundcolourdatamask,
+          { "Background Colour Data Mask",      "isobus.vt.get_window_mask_data.background_colour_data_mask",
+            FT_UINT8, BASE_DEC | BASE_RANGE_STRING, RVALS(vt_colours), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getwindowmaskdata_backgroundcoloursoftkeymask,
+          { "Background Colour Soft Key Mask",      "isobus.vt.get_window_mask_data.background_colour_soft_key_mask",
+            FT_UINT8, BASE_DEC | BASE_RANGE_STRING, RVALS(vt_colours), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getsupportedobjects_numberofbytes,
+          { "Number of bytes",      "isobus.vt.get_supported_objects.number_of_bytes",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getsupportedobjects_objecttype,
+          { "Object Type",      "isobus.vt.get_supported_objects.object_type",
+            FT_UINT8, BASE_DEC | BASE_RANGE_STRING, RVALS(vt_object_types), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_boottime,
+          { "Boot time",      "isobus.vt.get_hardware.boot_time",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_graphictype,
+          { "Graphic type",      "isobus.vt.get_hardware.graphic_type",
+            FT_UINT8, BASE_DEC, VALS(graphic_types), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_hardware,
+          { "Hardware",      "isobus.vt.get_hardware.hardware",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_hardware_touchscreen,
+          { "Touch Screen",      "isobus.vt.get_hardware.hardware.touch_screen",
+            FT_UINT8, BASE_HEX, NULL, 0x01,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_hardware_pointingdevice,
+          { "Pointing Device",      "isobus.vt.get_hardware.hardware.pointing_device",
+            FT_UINT8, BASE_HEX, NULL, 0x02,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_hardware_multifreqaudiooutput,
+          { "Multiple frequency audio output",      "isobus.vt.get_hardware.hardware.multiple_frequency_audio_output",
+            FT_UINT8, BASE_HEX, NULL, 0x04,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_hardware_adjustvolumeaudiooutput,
+          { "Adjustable volume audio output",      "isobus.vt.get_hardware.hardware.adjustable_volume_audio_output",
+            FT_UINT8, BASE_HEX, NULL, 0x08,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_hardware_simultaneousactivationphysicalsoftkeys,
+          { "Simultaneous activation of physical soft keys",      "isobus.vt.get_hardware.hardware.simultaneous_activation_physical_soft_keys",
+            FT_UINT8, BASE_HEX, NULL, 0x10,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_hardware_simultaneousactivationbuttons,
+          { "Simultaneous activation of buttons",      "isobus.vt.get_hardware.hardware.simultaneous_activation_buttons",
+            FT_UINT8, BASE_HEX, NULL, 0x20,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_hardware_dragoperation,
+          { "Reports drag operation",      "isobus.vt.get_hardware.hardware.drag_operation",
+            FT_UINT8, BASE_HEX, NULL, 0x40,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_hardware_intermediatecoordinatesdrag,
+          { "Intermediate coordinates during drag",      "isobus.vt.get_hardware.hardware.intermediate_coordinates_drag",
+            FT_UINT8, BASE_HEX, NULL, 0x80,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_xpixels,
+          { "X - Pixels",      "isobus.vt.get_hardware.x_pixels",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_gethardware_ypixels,
+          { "Y - Pixels",      "isobus.vt.get_hardware.y_pixels",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_storeversion_versionlabel,
+          { "Version Label",       "isobus.vt.store_version.version_label",
+            FT_STRING, STR_ASCII, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_storeversion_errorcodes,
+          { "Error Codes",       "isobus.vt.store_version.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_loadversion_versionlabel,
+          { "Version Label",       "isobus.vt.load_version.version_label",
+            FT_STRING, STR_ASCII, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_loadversion_errorcodes,
+          { "Error Codes",       "isobus.vt.load_version.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_deleteversion_versionlabel,
+          { "Version Label",       "isobus.vt.delete_version.version_label",
+            FT_STRING, STR_ASCII, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_deleteversion_errorcodes,
+          { "Error Codes",       "isobus.vt.delete_version.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_extendedgetversions_numberofversions,
+          { "Number of versions",  "isobus.vt.extended_get_versions.number_of_versions",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_extendedgetversions_versionlabel,
+          { "Version label",  "isobus.vt.extended_get_versions.version_label",
+            FT_STRING, STR_ASCII, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_extendedstoreversion_versionlabel,
+          { "Version Label",       "isobus.vt.extended_store_version.version_label",
+            FT_STRING, STR_ASCII, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_extendedstoreversion_errorcodes,
+          { "Error Codes",       "isobus.vt.extended_store_version.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_extendedloadversion_versionlabel,
+          { "Version Label",       "isobus.vt.extended_load_version.version_label",
+            FT_STRING, STR_ASCII, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_extendedloadversion_errorcodes,
+          { "Error Codes",       "isobus.vt.extended_load_version.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_extendeddeleteversion_versionlabel,
+          { "Version Label",       "isobus.vt.extended_delete_version.version_label",
+            FT_STRING, STR_ASCII, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_extendeddeleteversion_errorcodes,
+          { "Error Codes",       "isobus.vt.extended_delete_version.error_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getversions_numberofversions,
+          { "Number of versions",  "isobus.vt.get_versions.number_of_versions",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_getversions_versionlabel,
+          { "Version label",  "isobus.vt.get_versions.version_label",
+            FT_STRING, STR_ASCII, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_unsupportedvtfunction_unsupportedvtfunction,
+          { "Unsupported VT function",       "isobus.vt.unsupported_vt_function.unsupported_vt_function",
+            FT_UINT8, BASE_DEC | BASE_EXT_STRING, &vt_function_code_ext, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_workingsetmaster,
+          { "Working Set Master",       "isobus.vt.vtstatus.working_set_master",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_objectiddatamask,
+          { "Object ID Data Mask",      "isobus.vt.vtstatus.object_id_data_mask",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_objectidsoftkeymask,
+          { "Object ID Soft Key Mask",  "isobus.vt.vtstatus.object_id_soft_key_mask",
+            FT_UINT16, BASE_DEC_HEX, VALS(object_id_strings), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_vtbusycodes,
+          { "VT Busy Codes",            "isobus.vt.vtstatus.vt_busy_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_vtbusycodes_updatingvisiblemask,
+          { "VT is busy updating visible mask",            "isobus.vt.vtstatus.vt_busy_codes.updating_visible_mask",
+            FT_UINT8, BASE_HEX, NULL, 0x80,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_vtbusycodes_savingdata,
+          { "VT is busy saving data to non-volatile memory","isobus.vt.vtstatus.vt_busy_codes.saving_data",
+            FT_UINT8, BASE_HEX, NULL, 0x40,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_vtbusycodes_executingcommand,
+          { "VT is busy executing a command",            "isobus.vt.vtstatus.vt_busy_codes.executing_commands",
+            FT_UINT8, BASE_HEX, NULL, 0x20,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_vtbusycodes_executingmacro,
+          { "VT is busy executing a Macro",            "isobus.vt.vtstatus.vt_busy_codes.executing_macro",
+            FT_UINT8, BASE_HEX, NULL, 0x10,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_vtbusycodes_parsingobjectpool,
+          { "VT is busy parsing an object pool",            "isobus.vt.vtstatus.vt_busy_codes.parsing_object_pool",
+            FT_UINT8, BASE_HEX, NULL, 0x8,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_vtbusycodes_auxcontrolsactive,
+          { "Auxiliary controls learn mode active",        "isobus.vt.vtstatus.vt_function_codes.aux_controls_active",
+            FT_UINT8, BASE_HEX, NULL, 0x2,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_vtbusycodes_outofmemory,
+          { "VT is out of memory",        "isobus.vt.vtstatus.vt_function_codes.out_of_memory",
+            FT_UINT8, BASE_HEX, NULL, 0x1,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_vtstatus_vtfunctioncodes,
+          { "VT Function Codes",        "isobus.vt.vtstatus.vt_function_codes",
+            FT_UINT8, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_wrksetmain_bitmask,
+          { "Bitmask",                   "isobus.vt.working_set_maintenance.bitmask",
+            FT_UINT8, BASE_DEC, NULL, 0x80,
+            NULL, HFILL }
+        },
+        { &hf_isobus_vt_wrksetmain_version,
+          { "Version",                  "isobus.vt.working_set_maintenance.version",
+            FT_UINT8, BASE_DEC | BASE_RANGE_STRING, RVALS(vt_versions), 0x0,
+            NULL, HFILL }
+        }
+    };
+
+    static gint *ett[] = {
+        &ett_isobus_vt,
+        &ett_isobus_vt_vtstatus_busycodes_subtree,
+        &ett_isobus_vt_getsupportedwidechars_range,
+        &ett_isobus_vt_gettextfontdata_smallfontsizes,
+        &ett_isobus_vt_gettextfontdata_largefontsizes,
+        &ett_isobus_vt_gettextfontdata_typeattributes,
+        &ett_isobus_vt_gethardware_hardware,
+        &ett_isobus_vt_preferredassignment_inputunit,
+        &ett_isobus_vt_preferredassignment_inputunit_preferredfunction,
+        &ett_isobus_vt_auxiliarycapabilities_inputunit,
+        &ett_isobus_vt_auxiliarycapabilities_inputunit_set,
+        &ett_isobus_vt_auxiliaryassignmenttype2_flags,
+        &ett_isobus_vt_auxiliaryinputtype2status_operatingstate
+    };
+
+    module_t *vt_module;
+
+    register_init_routine(&isobus_vt_init);
+
+    proto_vt = proto_register_protocol("ISObus Virtual Terminal",
+                                       "ISObus VT",
+                                       "isobus.vt");
+
+    proto_register_field_array(proto_vt, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    /* register preferences */
+    vt_module = prefs_register_protocol(proto_vt, NULL);
+
+    /* file to translate opject ids to names, format should be separate line for each object.
+     * objects should be specified in the following way: <object ID number>,<object ID name>
+     */
+    prefs_register_filename_preference(vt_module, "object_ids", "Object ID Translation",
+        "File containing a translation from object ID to string", &object_id_translation,
+        FALSE);
+}
+
+void
+proto_reg_handoff_isobus_vt(void)
+{
+    dissector_handle_t vt_handle_vt_to_ecu;
+    dissector_handle_t vt_handle_ecu_to_vt;
+
+    vt_handle_vt_to_ecu = create_dissector_handle( dissect_vt_to_ecu, proto_vt );
+    vt_handle_ecu_to_vt = create_dissector_handle( dissect_ecu_to_vt, proto_vt );
+
+    dissector_add_uint("isobus.pdu_format", 230, vt_handle_vt_to_ecu);
+    dissector_add_uint("isobus.pdu_format", 231, vt_handle_ecu_to_vt);
+}
+
+/*
+ * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */
diff --git a/epan/dissectors/packet-isobus.c b/epan/dissectors/packet-isobus.c
new file mode 100644
index 0000000000..3c11ed4d78
--- /dev/null
+++ b/epan/dissectors/packet-isobus.c
@@ -0,0 +1,872 @@
+/* packet-isobus.c
+ * Routines for ISObus dissection (Based on CANOpen Dissector)
+ * Copyright 2016, Jeroen Sack <jsack@lely.com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/reassemble.h>
+#include <epan/dissectors/packet-socketcan.h>
+#include <epan/wmem/wmem_map.h>
+
+void proto_register_isobus(void);
+void proto_reg_handoff_isobus(void);
+
+/* Initialize the protocol and registered fields */
+static int proto_isobus = -1;
+static int hf_isobus_can_id = -1;
+static int hf_isobus_priority = -1;
+static int hf_isobus_ext_data_page = -1;
+static int hf_isobus_src_addr = -1;
+static int hf_isobus_data_page = -1;
+static int hf_isobus_pdu_format_dp0 = -1;
+static int hf_isobus_pdu_format_dp1 = -1;
+static int hf_isobus_dst_addr = -1;
+static int hf_isobus_group_extension = -1;
+static int hf_isobus_transportprotocol_controlbyte = -1;
+static int hf_isobus_transportprotocol_requesttosend_totalsize = -1;
+static int hf_isobus_transportprotocol_requesttosend_numberofpackets = -1;
+static int hf_isobus_transportprotocol_requesttosend_maximumpackets = -1;
+static int hf_isobus_transportprotocol_requesttosend_pgn = -1;
+static int hf_isobus_transportprotocol_cleartosend_numberofpacketscanbesent = -1;
+static int hf_isobus_transportprotocol_cleartosend_nextpacketnumber = -1;
+static int hf_isobus_transportprotocol_cleartosend_pgn = -1;
+static int hf_isobus_transportprotocol_endofmsgack_totalsize = -1;
+static int hf_isobus_transportprotocol_endofmsgack_numberofpackets = -1;
+static int hf_isobus_transportprotocol_endofmsgack_pgn = -1;
+static int hf_isobus_transportprotocol_connabort_abortreason = -1;
+static int hf_isobus_transportprotocol_connabort_pgn = -1;
+static int hf_isobus_transportprotocol_broadcastannouncemessage_totalsize = -1;
+static int hf_isobus_transportprotocol_broadcastannouncemessage_numberofpackets = -1;
+static int hf_isobus_transportprotocol_broadcastannouncemessage_pgn = -1;
+
+static int hf_msg_fragments = -1;
+static int hf_msg_fragment = -1;
+static int hf_msg_fragment_overlap = -1;
+static int hf_msg_fragment_overlap_conflicts = -1;
+static int hf_msg_fragment_multiple_tails = -1;
+static int hf_msg_fragment_too_long_fragment = -1;
+static int hf_msg_fragment_error = -1;
+static int hf_msg_fragment_count = -1;
+static int hf_msg_reassembled_in = -1;
+static int hf_msg_reassembled_length = -1;
+static int hf_msg_reassembled_data = -1;
+
+/* Desegmentation of isobus transport protocol streams */
+static reassembly_table isobus_reassembly_table;
+static unsigned int reassembly_total_size;
+static unsigned int reassembly_current_size;
+
+static dissector_table_t subdissector_table;
+
+#define VT_TO_ECU 230
+#define ECU_TO_VT 231
+#define ETP_DATA_TRANSFER 199
+#define ETP_DATA_MANAGEMENT 200
+#define TP_DATA_TRANSFER 235
+#define TP_DATA_MANAGEMENT 236
+
+static const value_string pdu_format_dp0[] = {
+    { 7  , "General-purpose valve load sense pressure" },
+    { 147, "NAME management" },
+    { 170, "Client to File Server" },
+    { 171, "File Server to Client" },
+    { 172, "Guidance machine status" },
+    { 173, "Guidance system command" },
+    { 196, "General-purpose valve command" },
+    { 197, "General-purpose valve measured flow" },
+    { 198, "General-purpose valve estimated flow" },
+    { ETP_DATA_TRANSFER, "EXTENDED TRANSPORT PROTOCOL - DATA TRANSFER" },
+    { ETP_DATA_MANAGEMENT, "EXTENDED TRANSPORT PROTOCOL - CONNECTION MANAGEMENT" },
+    { 201, "REQUEST2" },
+    { 202, "TRANSFER" },
+    { VT_TO_ECU, "VT to ECU" },
+    { ECU_TO_VT, "ECU to VT" },
+    { 232, "ACKNOWLEDGEMENT" },
+    { 234, "REQUEST" },
+    { TP_DATA_TRANSFER, "TRANSPORT PROTOCOL - DATA TRANSFER" },
+    { TP_DATA_MANAGEMENT, "TRANSPORT PROTOCOL - CONNECTION MANAGEMENT" },
+    { 238, "ADDRESS CLAIM" },
+    { 239, "PROPRIETARY A" },
+    { 253, "Certification / Operating state" },
+    { 254, "Parameter groups" },
+    { 255, "PROPRIETARY B" },
+    { 0, NULL }
+};
+
+static const value_string pdu_format_dp0_short[] = {
+    { 7  , "GPV.LSP" },
+    { 147, "NM" },
+    { 170, "C2FS" },
+    { 171, "FS2C" },
+    { 172, "G.MS" },
+    { 173, "G.SC" },
+    { 196, "GPV.C" },
+    { 197, "GPV.MF" },
+    { 198, "GPV.EF" },
+    { ETP_DATA_TRANSFER, "ETP.DT" },
+    { ETP_DATA_MANAGEMENT, "ETP.CM" },
+    { 201, "REQ2" },
+    { 202, "TRANS" },
+    { VT_TO_ECU, "VT2ECU" },
+    { ECU_TO_VT, "ECU2VT" },
+    { 232, "ACK" },
+    { 234, "REQ" },
+    { TP_DATA_TRANSFER, "TP.DT" },
+    { TP_DATA_MANAGEMENT, "TP.CM" },
+    { 238, "AC" },
+    { 239, "PR.A" },
+    { 253, "Cert/OS" },
+    { 254, "PAR.G" },
+    { 255, "PR.B" },
+    { 0, NULL }
+};
+
+static const value_string pdu_format_dp1[] = {
+    { 239, "PROPRIETARY A2" },
+    { 0, NULL }
+};
+
+static const value_string pdu_format_dp1_short[] = {
+    { 239, "PR.A2" },
+    { 0, NULL }
+};
+
+static const range_string address_range[] = {
+    { 0  , 127, "Preferred Address" },
+    { 128, 247, "Self-configurable Address" },
+    { 248, 253, "Preferred Address" },
+    { 254, 254, "NULL Address" },
+    { 255, 255, "Global Address" },
+    { 0, 0, NULL }
+};
+
+static const range_string connection_abort_reasons[] = {
+    { 1, 1, "Already in one or more connection-managed sessions and cannot support another" },
+    { 2, 2, "System resources were needed for another task so this connection managed session was terminated" },
+    { 3, 3, "A timeout occurred and this is the connection abort to close the session" },
+    { 4, 4, "CTS messages received when data transfer is in progress" },
+    { 5, 5, "Maximum retransmit request limit reached" },
+    { 6, 6, "Unexpected data transfer packet" },
+    { 7, 7, "Bad sequence number (and software is not able to recover)" },
+    { 8, 8, "Duplicate sequence number (and software is not able to recover)" },
+    { 9, 250, "Reserved for assignment in a future International Standard" },
+    { 251, 255, "According to ISO 11783-7 definitions" },
+    { 0, 0, NULL }
+};
+
+static const value_string transport_protocol_control_byte[] = {
+    { 16, "Request To Send" },
+    { 17, "Clear To Send" },
+    { 19, "End of Message Acknowledgement" },
+    { 255, "Connection Abort" },
+    { 32, "Broadcast Announce Message" },
+    { 0, NULL }
+};
+
+static gint ett_isobus = -1;
+static gint ett_isobus_can_id = -1;
+static gint ett_isobus_fragment = -1;
+static gint ett_isobus_fragments = -1;
+
+static const fragment_items isobus_frag_items = {
+    &ett_isobus_fragment,
+    &ett_isobus_fragments,
+    /* Fragment fields */
+    &hf_msg_fragments,
+    &hf_msg_fragment,
+    &hf_msg_fragment_overlap,
+    &hf_msg_fragment_overlap_conflicts,
+    &hf_msg_fragment_multiple_tails,
+    &hf_msg_fragment_too_long_fragment,
+    &hf_msg_fragment_error,
+    &hf_msg_fragment_count,
+    /* Reassembled in field */
+    &hf_msg_reassembled_in,
+    /* Reassembled length field */
+    &hf_msg_reassembled_length,
+    &hf_msg_reassembled_data,
+    /* Tag */
+    "Message fragments"
+};
+
+struct address_combination
+{
+    guint8 src_address;
+    guint8 dst_address;
+};
+
+struct reassemble_identifier
+{
+    guint32 startFrameId;
+    guint32 endFrameId;
+    guint32 identifier;
+};
+
+struct address_reassemble_table
+{
+    wmem_list_t* reassembleIdentifierTable;
+    guint32 identifierCounter;
+};
+
+static wmem_map_t *addressIdentifierTable = NULL;
+
+static struct reassemble_identifier* findIdentifierFor(wmem_list_t* reassembleIdentifierTable, guint32 frameIndex)
+{
+    wmem_list_frame_t* currentItem = wmem_list_head(reassembleIdentifierTable);
+
+    while (currentItem != NULL)
+    {
+        struct reassemble_identifier* currentData = (struct reassemble_identifier*)wmem_list_frame_data(currentItem);
+        if (frameIndex <= currentData->endFrameId && frameIndex >= currentData->startFrameId)
+        {
+            return currentData;
+        }
+        else
+        {
+            currentItem = wmem_list_frame_next(currentItem);
+        }
+    }
+    return NULL;
+}
+
+static gboolean
+address_combination_equal(gconstpointer p1, gconstpointer p2)
+{
+    const struct address_combination* addr_combi1 = (const struct address_combination*)p1;
+    const struct address_combination* addr_combi2 = (const struct address_combination*)p2;
+
+    if (addr_combi1->src_address == addr_combi2->src_address &&
+        addr_combi1->dst_address == addr_combi2->dst_address)
+    {
+        return TRUE;
+    }
+    else
+    {
+        return FALSE;
+    }
+}
+
+static guint
+address_combination_hash(gconstpointer p)
+{
+    const struct address_combination* addr_combi = (const struct address_combination*)p;
+    return (addr_combi->src_address * 256) + (addr_combi->dst_address);
+}
+
+static struct address_reassemble_table* findAddressIdentifierFor(guint8 src_address, guint8 dst_address)
+{
+    struct address_combination* addrCombi = wmem_new(wmem_file_scope(), struct address_combination);
+
+    struct address_reassemble_table* foundItem;
+
+    addrCombi->src_address = src_address;
+    addrCombi->dst_address = dst_address;
+
+    foundItem = (struct address_reassemble_table*)wmem_map_lookup(addressIdentifierTable, addrCombi);
+
+    if(foundItem != NULL)
+    {
+        return foundItem;
+    }
+    else
+    {
+        /* nothing found so create a new one */
+        struct address_reassemble_table* newItem;
+        newItem = wmem_new(wmem_file_scope(), struct address_reassemble_table);
+        newItem->identifierCounter = 0;
+        newItem->reassembleIdentifierTable = wmem_list_new(wmem_file_scope());
+        wmem_map_insert(addressIdentifierTable, addrCombi, newItem);
+        return newItem;
+    }
+}
+
+/* Code to actually dissect the packets */
+static int
+dissect_isobus(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
+{
+    /* guint        priority; */
+    /* guint        ext_data_page; */
+    guint        src_addr;
+    guint        data_page;
+    guint        pdu_format;
+    guint        pdu_specific;
+    struct can_identifier can_id;
+    char str_dst[10];
+    char str_src[4];
+
+    static guint seqnr = 0;
+
+    int data_offset = 0;
+
+    proto_item *ti, *can_id_ti;
+    proto_tree *isobus_tree;
+    proto_tree *isobus_can_id_tree;
+
+    struct reassemble_identifier* identifier = NULL;
+    struct address_reassemble_table* address_reassemble_table_item = NULL;
+
+    DISSECTOR_ASSERT(data);
+    can_id = *((struct can_identifier*)data);
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISObus");
+    col_clear(pinfo->cinfo, COL_INFO);
+
+    /*priority      = (can_id.id >> 26) & 0x07;*/
+    /*ext_data_page = (can_id.id >> 25) & 0x01;*/
+    data_page     = (can_id.id >> 24) & 0x01;
+    pdu_format    = (can_id.id >> 16) & 0xff;
+    pdu_specific  = (can_id.id >> 8) & 0xff;
+    src_addr      = (can_id.id >> 0 ) & 0xff;
+
+    ti = proto_tree_add_item(tree, proto_isobus, tvb, 0, tvb_reported_length(tvb), ENC_NA);
+    isobus_tree = proto_item_add_subtree(ti, ett_isobus);
+
+    /* add COB-ID with function code and node id */
+    can_id_ti = proto_tree_add_uint(isobus_tree, hf_isobus_can_id, tvb, 0, 0, can_id.id);
+    isobus_can_id_tree = proto_item_add_subtree(can_id_ti, ett_isobus_can_id);
+
+    /* add priority */
+    ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_priority, tvb, 0, 0, can_id.id);
+    PROTO_ITEM_SET_GENERATED(ti);
+
+    /* add extended data page */
+    ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_ext_data_page, tvb, 0, 0, can_id.id);
+    PROTO_ITEM_SET_GENERATED(ti);
+
+    /* add data page */
+    ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_data_page, tvb, 0, 0, can_id.id);
+    PROTO_ITEM_SET_GENERATED(ti);
+
+    /* add pdu format */
+    switch(data_page)
+    {
+    case 0:
+        ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_pdu_format_dp0, tvb, 0, 0, can_id.id);
+        PROTO_ITEM_SET_GENERATED(ti);
+        break;
+    case 1:
+        ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_pdu_format_dp1, tvb, 0, 0, can_id.id);
+        PROTO_ITEM_SET_GENERATED(ti);
+        break;
+    }
+
+    /* add pdu specific */
+    if(pdu_format <= 239)
+    {
+        ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_dst_addr, tvb, 0, 0, can_id.id);
+            PROTO_ITEM_SET_GENERATED(ti);
+    }
+    else
+    {
+        ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_group_extension, tvb, 0, 0, can_id.id);
+            PROTO_ITEM_SET_GENERATED(ti);
+    }
+
+    /* add source address */
+    ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_src_addr, tvb, 0, 0, can_id.id);
+    PROTO_ITEM_SET_GENERATED(ti);
+
+    /* put source address in source field */
+    g_snprintf(str_src, 4, "%d", src_addr);
+    alloc_address_wmem(pinfo->pool, &pinfo->src, AT_STRINGZ, (int)strlen(str_src) + 1, str_src);
+
+    if(pdu_format <= 239) /* PDU1 format */
+    {
+        /* put destination address in address field */
+        g_snprintf(str_dst, 4, "%d", pdu_specific);
+        alloc_address_wmem(pinfo->pool, &pinfo->dst, AT_STRINGZ, (int)strlen(str_dst) + 1, str_dst);
+    }
+    else
+    {
+        /* put group destination address in address field and add (grp) to it */
+        g_snprintf(str_dst, 10, "%d (grp)", pdu_specific);
+        alloc_address_wmem(pinfo->pool, &pinfo->dst, AT_STRINGZ, (int)strlen(str_dst) + 1, str_dst);
+    }
+
+    switch(data_page)
+    {
+    case 0:
+        col_append_fstr(pinfo->cinfo, COL_INFO, "[%s] ",
+            val_to_str(pdu_format, pdu_format_dp0_short, "Unknown"));
+        break;
+    case 1:
+        col_append_fstr(pinfo->cinfo, COL_INFO, "[%s] ",
+            val_to_str(pdu_format, pdu_format_dp1_short, "Unknown"));
+        break;
+    }
+
+    if (pdu_format == TP_DATA_MANAGEMENT  || pdu_format == TP_DATA_TRANSFER ||
+        pdu_format == ETP_DATA_MANAGEMENT || pdu_format == ETP_DATA_TRANSFER)
+    {
+        gboolean isReply = FALSE;
+        if(pdu_format == TP_DATA_MANAGEMENT)
+        {
+            guint8 control_byte = tvb_get_guint8(tvb, data_offset);
+            switch(control_byte)
+            {
+                case 17:
+                case 19:
+                    isReply = TRUE;
+                    break;
+                case 16:
+                default:
+                    isReply = FALSE;
+                    break;
+            }
+        }
+        if(isReply)
+        {
+            address_reassemble_table_item =
+                findAddressIdentifierFor(pdu_specific, src_addr);
+        }
+        else
+        {
+            address_reassemble_table_item =
+                findAddressIdentifierFor(src_addr, pdu_specific);
+        }
+        identifier = findIdentifierFor(
+            address_reassemble_table_item->reassembleIdentifierTable,
+            pinfo->num);
+    }
+
+    if(pdu_format == TP_DATA_MANAGEMENT)
+    {
+        guint32 control_byte;
+        proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_controlbyte, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &control_byte);
+        data_offset += 1;
+
+        if (control_byte == 16)
+        {
+            guint32 total_size, number_of_packets;
+
+            proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_requesttosend_totalsize, tvb, data_offset, 2, ENC_LITTLE_ENDIAN, &total_size);
+            data_offset += 2;
+
+            proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_requesttosend_numberofpackets, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &number_of_packets);
+            data_offset += 1;
+
+            proto_tree_add_item(tree, hf_isobus_transportprotocol_requesttosend_maximumpackets, tvb, data_offset, 1, ENC_LITTLE_ENDIAN);
+            data_offset += 1;
+
+            proto_tree_add_item(tree, hf_isobus_transportprotocol_requesttosend_pgn, tvb, data_offset, 3, ENC_LITTLE_ENDIAN);
+
+            if (identifier)
+            {
+                seqnr = identifier->identifier;
+            }
+            else
+            {
+                struct reassemble_identifier* reassembleIdentifierTableEntry =
+                    wmem_new(wmem_file_scope(), struct reassemble_identifier);
+                seqnr = ++address_reassemble_table_item->identifierCounter;
+                reassembleIdentifierTableEntry->identifier = seqnr;
+                reassembleIdentifierTableEntry->startFrameId = pinfo->num;
+                reassembleIdentifierTableEntry->endFrameId = pinfo->num;
+
+                wmem_list_append(address_reassemble_table_item->reassembleIdentifierTable, reassembleIdentifierTableEntry);
+            }
+
+            fragment_add_seq(&isobus_reassembly_table, tvb, 5, pinfo,
+                seqnr, NULL, 0, 3, TRUE, 0);
+            fragment_set_tot_len(&isobus_reassembly_table, pinfo,
+                seqnr, NULL, number_of_packets);
+            reassembly_current_size = 3;
+            reassembly_total_size = total_size + 3;
+
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Request to send message of %u bytes in %u fragments", total_size, number_of_packets);
+        }
+        else if (control_byte == 17)
+        {
+            guint32 number_of_packets_can_be_sent, next_packet_number;
+
+            proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_cleartosend_numberofpacketscanbesent, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &number_of_packets_can_be_sent);
+            data_offset += 1;
+
+            proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_cleartosend_nextpacketnumber, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &next_packet_number);
+            data_offset += 1;
+
+            data_offset += 2;
+
+            proto_tree_add_item(tree, hf_isobus_transportprotocol_cleartosend_pgn, tvb, data_offset, 3, ENC_LITTLE_ENDIAN);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Clear to send, can receive %u packets, next packet is %u", number_of_packets_can_be_sent, next_packet_number);
+        }
+        else if (control_byte == 19)
+        {
+            guint32 total_size, number_of_packets;
+
+            proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_endofmsgack_totalsize, tvb, data_offset, 2, ENC_LITTLE_ENDIAN, &total_size);
+            data_offset += 2;
+
+            proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_endofmsgack_numberofpackets, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &number_of_packets);
+            data_offset += 1;
+
+            data_offset += 1;
+
+            proto_tree_add_item(tree, hf_isobus_transportprotocol_endofmsgack_pgn, tvb, data_offset, 3, ENC_LITTLE_ENDIAN);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "End of Message Acknowledgement, %u bytes sent in %u packets", total_size, number_of_packets);
+        }
+        else if (control_byte == 255)
+        {
+            guint32 connection_abort_reason;
+
+            proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_connabort_abortreason, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &connection_abort_reason);
+            data_offset += 1;
+
+            data_offset += 3;
+
+            proto_tree_add_item(tree, hf_isobus_transportprotocol_connabort_pgn, tvb, data_offset, 3, ENC_LITTLE_ENDIAN);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Connection Abort, %s", rval_to_str(connection_abort_reason, connection_abort_reasons, "unknown reason"));
+        }
+        else if (control_byte == 32)
+        {
+            guint32 total_size, number_of_packets;
+
+            proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_broadcastannouncemessage_totalsize, tvb, data_offset, 2, ENC_LITTLE_ENDIAN, &total_size);
+            data_offset += 2;
+
+            proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_broadcastannouncemessage_numberofpackets, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &number_of_packets);
+            data_offset += 1;
+
+            data_offset += 1;
+
+            proto_tree_add_item(tree, hf_isobus_transportprotocol_broadcastannouncemessage_pgn, tvb, data_offset, 3, ENC_LITTLE_ENDIAN);
+
+            col_append_fstr(pinfo->cinfo, COL_INFO, "Broadcast Announcement Message, %u bytes sent in %u packets", total_size, number_of_packets);
+        }
+    }
+
+    //if reassemble has not started yet don't parse the message
+    else if (pdu_format == TP_DATA_TRANSFER && address_reassemble_table_item->reassembleIdentifierTable != NULL)
+    {
+        tvbuff_t *reassembled_data;
+        guint16 fragment_size = 0;
+        gboolean lastPacket;
+        guint8 sequenceId = tvb_get_guint8(tvb, 0);
+        fragment_head *fg_head;
+        if (identifier == NULL)
+        {
+            wmem_list_frame_t* lastItem = wmem_list_tail(address_reassemble_table_item->reassembleIdentifierTable);
+            if(lastItem != NULL)
+            {
+                struct reassemble_identifier* lastIdentifier = (struct reassemble_identifier*)wmem_list_frame_data(lastItem);
+                lastIdentifier->endFrameId = pinfo->num;
+                identifier = lastIdentifier;
+            }
+        }
+
+        if(identifier != NULL)
+        {
+            if(reassembly_total_size > reassembly_current_size + 7)
+            {
+                fragment_size = 7;
+                lastPacket = FALSE;
+            }
+            else
+            {
+                fragment_size = reassembly_total_size - reassembly_current_size;
+                lastPacket = TRUE;
+            }
+
+            fg_head = fragment_add_seq(&isobus_reassembly_table, tvb, 1, pinfo,
+                identifier->identifier, NULL, sequenceId, fragment_size, !lastPacket, 0);
+            reassembly_current_size += fragment_size;
+
+            reassembled_data = process_reassembled_data(tvb, 0, pinfo, "Reassembled data",
+                fg_head, &isobus_frag_items, NULL, tree);
+            if (reassembled_data)
+            {
+                guint8 pdu_format_reassembled = tvb_get_guint8(reassembled_data, 1);
+
+                if (dissector_try_uint_new(subdissector_table, pdu_format_reassembled,
+                    tvb_new_subset_remaining(reassembled_data, 3), pinfo,
+                    isobus_tree, FALSE, NULL) == 0)
+                {
+                    col_append_fstr(pinfo->cinfo, COL_INFO, "Protocol not yet supported");
+                }
+            }
+            else
+            {
+                col_append_fstr(pinfo->cinfo, COL_INFO, "Fragment number %u", sequenceId);
+            }
+        }
+        else
+        {
+            col_append_fstr(pinfo->cinfo, COL_INFO, "ERROR: Transport protocol was not initialized");
+        }
+    }
+    else if(dissector_try_uint_new(subdissector_table, pdu_format, tvb, pinfo, isobus_tree, FALSE, data) == 0)
+    {
+        col_append_fstr(pinfo->cinfo, COL_INFO, "Protocol not yet supported");
+    }
+
+    return tvb_reported_length(tvb);
+}
+
+static void
+isobus_init(void)
+{
+    reassembly_table_init(&isobus_reassembly_table, &addresses_reassembly_table_functions);
+}
+
+static void
+isobus_cleanup(void)
+{
+    reassembly_table_destroy(&isobus_reassembly_table);
+}
+
+/* Register the protocol with Wireshark */
+void
+proto_register_isobus(void)
+{
+    static hf_register_info hf[] = {
+        { &hf_isobus_can_id,
+          { "CAN-ID", "isobus.can_id",
+            FT_UINT32, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_priority,
+          { "Priority", "isobus.priority",
+            FT_UINT32, BASE_HEX, NULL, 0x1C000000,
+            NULL, HFILL }
+        },
+        { &hf_isobus_ext_data_page,
+          { "Ext data page", "isobus.edp",
+            FT_UINT32, BASE_HEX, NULL, 0x2000000,
+            NULL, HFILL }
+        },
+        { &hf_isobus_data_page,
+          { "Data page", "isobus.datapage",
+            FT_UINT32, BASE_HEX, NULL, 0x1000000,
+            NULL, HFILL }
+        },
+        { &hf_isobus_pdu_format_dp0,
+          { "PDU Format", "isobus.pdu_format",
+            FT_UINT32, BASE_DEC, VALS(pdu_format_dp0), 0xff0000,
+            NULL, HFILL }
+        },
+        { &hf_isobus_pdu_format_dp1,
+          { "PDU Format", "isobus.pdu_format",
+            FT_UINT32, BASE_DEC, VALS(pdu_format_dp1), 0xff0000,
+            NULL, HFILL }
+        },
+        { &hf_isobus_group_extension,
+          { "Group Extension", "isobus.grp_ext",
+            FT_UINT32, BASE_DEC, NULL, 0xff00,
+            NULL, HFILL }
+        },
+        { &hf_isobus_dst_addr,
+          { "Destination Address", "isobus.dst_addr",
+            FT_UINT32, BASE_DEC | BASE_RANGE_STRING, RVALS(address_range), 0xff00,
+            NULL, HFILL }
+        },
+        { &hf_isobus_src_addr,
+          { "Source Address", "isobus.src_addr",
+            FT_UINT32, BASE_DEC | BASE_RANGE_STRING, RVALS(address_range), 0xff,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_controlbyte,
+          { "Control Byte", "isobus.transport_protocol.control_byte",
+            FT_UINT8, BASE_DEC, VALS(transport_protocol_control_byte), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_requesttosend_totalsize,
+          { "Total message size", "isobus.transport_protocol.request_to_send.total_size",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_requesttosend_numberofpackets,
+          { "Number of Packets", "isobus.transport_protocol.request_to_send.number_of_packets",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_requesttosend_maximumpackets,
+          { "Maximum Packets", "isobus.transport_protocol.request_to_send.maximum_packets",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_requesttosend_pgn,
+          { "PGN", "isobus.transport_protocol.request_to_send.pgn",
+            FT_UINT24, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_cleartosend_numberofpacketscanbesent,
+          { "Number of packets that can be sent", "isobus.transport_protocol.request_to_send.number_of_packets_that_can_be_sent",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_cleartosend_nextpacketnumber,
+          { "Next packet number", "isobus.transport_protocol.request_to_send.next_packet_number",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_cleartosend_pgn,
+          { "PGN", "isobus.transport_protocol.clear_to_send.pgn",
+            FT_UINT24, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_endofmsgack_totalsize,
+          { "Total Size", "isobus.transport_protocol.end_of_message_acknowledgement.total_size",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_endofmsgack_numberofpackets,
+          { "Number of Packets",           "isobus.transport_protocol.end_of_message_acknowledgement.number_of_packets",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_endofmsgack_pgn,
+          { "PGN", "isobus.transport_protocol.end_of_message_acknowledgement.pgn",
+            FT_UINT24, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_connabort_abortreason,
+          { "Connection Abort reason", "isobus.transport_protocol.connection_abort.abort_reason",
+            FT_UINT8, BASE_DEC, VALS(connection_abort_reasons), 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_connabort_pgn,
+          { "PGN", "isobus.transport_protocol.connection_abort.pgn",
+            FT_UINT24, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_broadcastannouncemessage_totalsize,
+          { "Total Message Size", "isobus.transport_protocol.broadcast_announce_message.total_message_size",
+            FT_UINT16, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_broadcastannouncemessage_numberofpackets,
+          { "Total Number of Packets", "isobus.transport_protocol.broadcast_announce_message.total_number_of_packets",
+            FT_UINT8, BASE_DEC, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_isobus_transportprotocol_broadcastannouncemessage_pgn,
+          { "PGN", "isobus.transport_protocol.broadcast_announce_message.pgn",
+            FT_UINT24, BASE_HEX, NULL, 0x0,
+            NULL, HFILL }
+        },
+        { &hf_msg_fragments,
+          { "Message fragments", "isobus.fragments",
+            FT_NONE, BASE_NONE, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_msg_fragment,
+          { "Message fragment", "isobus.fragment",
+            FT_FRAMENUM, BASE_NONE, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_msg_fragment_overlap,
+          { "Message fragment overlap", "isobus.fragment.overlap",
+            FT_BOOLEAN, 0, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_msg_fragment_overlap_conflicts,
+          { "Message fragment overlapping with conflicting data", "isobus.fragment.overlap.conflicts",
+            FT_BOOLEAN, 0, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_msg_fragment_multiple_tails,
+          { "Message has multiple tail fragments", "isobus.fragment.multiple_tails",
+            FT_BOOLEAN, 0, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_msg_fragment_too_long_fragment,
+          { "Message fragment too long", "isobus.fragment.too_long_fragment",
+            FT_BOOLEAN, 0, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_msg_fragment_error,
+          { "Message defragmentation error", "isobus.fragment.error",
+            FT_FRAMENUM, BASE_NONE, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_msg_fragment_count,
+          { "Message fragment count", "isobus.fragment.count",
+            FT_UINT32, BASE_DEC, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_msg_reassembled_in,
+          { "Reassembled in", "isobus.reassembled.in",
+            FT_FRAMENUM, BASE_NONE, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_msg_reassembled_length,
+          { "Reassembled length", "isobus.reassembled.length",
+            FT_UINT32, BASE_DEC, NULL, 0x00,
+            NULL, HFILL }
+        },
+        { &hf_msg_reassembled_data,
+          { "Reassembled data", "isobus.reassembled.data",
+            FT_BYTES, BASE_NONE, NULL, 0x00,
+            NULL, HFILL }
+        }
+    };
+
+    static gint *ett[] = {
+        &ett_isobus,
+        &ett_isobus_can_id,
+        &ett_isobus_fragment,
+        &ett_isobus_fragments
+    };
+
+    /* Register protocol init routine */
+    register_init_routine(&isobus_init);
+    register_cleanup_routine(&isobus_cleanup);
+
+    proto_isobus = proto_register_protocol("ISObus",
+                                           "ISOBUS",
+                                           "isobus");
+
+    proto_register_field_array(proto_isobus, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    addressIdentifierTable = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), address_combination_hash, address_combination_equal);
+
+    subdissector_table = register_dissector_table("isobus.pdu_format",
+        "PDU format", proto_isobus, FT_UINT8, BASE_DEC);
+}
+
+void
+proto_reg_handoff_isobus(void)
+{
+   dissector_handle_t isobus_handle;
+
+   isobus_handle = create_dissector_handle( dissect_isobus, proto_isobus );
+   dissector_add_for_decode_as("can.subdissector", isobus_handle );
+}
+
+/*
+ * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:+
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */