(If you find progress and other non-error messages irritating, you can use -q to suppress them)

(You can use the -w option to dump extensions.conf format to extensions.conf.aeldump)
LOG: lev:2 file:pbx_ael.c  line:122 func: pbx_load_module  Starting AEL load process.
LOG: lev:2 file:pbx_ael.c  line:135 func: pbx_load_module  AEL load process: parsed config file name './extensions.ael'.
LOG: lev:3 file:pval.c  line:673 func: check_macro_returns  Warning: file ./extensions.ael, line 2-16: The macro testdial does not end with a return; I will insert one.
LOG: lev:3 file:pval.c  line:673 func: check_macro_returns  Warning: file ./extensions.ael, line 18-25: The macro exten-gen does not end with a return; I will insert one.
LOG: lev:3 file:pval.c  line:1365 func: check_goto  Warning: file ./extensions.ael, line 21-21: It's bad form to have a goto in a macro to a target outside the macro!
LOG: lev:3 file:pval.c  line:1365 func: check_goto  Warning: file ./extensions.ael, line 23-23: It's bad form to have a goto in a macro to a target outside the macro!
LOG: lev:3 file:pval.c  line:2300 func: check_switch_expr  Warning: file ./extensions.ael, line 58-58: A default case was automatically added to the switch.
LOG: lev:3 file:pval.c  line:925 func: check_dow  Warning: file ./extensions.ael, line 67-67: The day (m0n) must be one of 'sun', 'mon', 'tue', 'wed', 'thu', 'fri', or 'sat'!
LOG: lev:3 file:pval.c  line:883 func: check_timerange  Warning: file ./extensions.ael, line 78-78: The end time (25:00) is out of range!
LOG: lev:2 file:pbx_ael.c  line:138 func: pbx_load_module  AEL load process: checked config file name './extensions.ael'.
LOG: lev:2 file:pbx_ael.c  line:145 func: pbx_load_module  AEL load process: compiled config file name './extensions.ael'.
LOG: lev:2 file:pbx_ael.c  line:150 func: pbx_load_module  AEL load process: merged config file name './extensions.ael'.
LOG: lev:2 file:pbx_ael.c  line:153 func: pbx_load_module  AEL load process: verified config file name './extensions.ael'.
LOG: lev:4 file:ael2_parse  line:516 func: main  5 contexts, 16 extensions, 160 priorities