Debugging with GT.M
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Revision as of 21:24, 23 March 2005 by 68.171.114.173 (talk)
This information is from the GT.M Programmer's Manual. I'll just summarize a few points.
$ECODE This is a list of past errors, separated by commas. Subsequent errors are added to the end of the list. Example: GTM>w $ECODE ,M6,Z150373850, Errors beginning with: "M" are standard errors "U" are user errors "Z" are GT.M errors
$ZSTATUS This is detail about the most recent error. Example: GTM>w $ZSTATUS 150373850,SubName+3^MyFunct,%GTM-E-UNDEF, Undefined local variable: Jxack
$ZMESSAGE(x) This will give a text message for a given error number. Example: To get details about the error number, 150373850, given above... GTM>w $ZMESSAGE(150373850) %GTM-E-UNDEF, Undefined local variable: !AD
ZPRINT x (e.g. ZPRINT SubName+3^MyFunct) This will display the line that cause the program exception. The 'x' may be obtained from $ZSTATUS, or from $ZPOS (see below)
$ZPOSITION (OR $ZPOS) Shows the current position of the current line of execution (or the last line exececuted in case of an error)
ZWRITE Shows the entire variable table, displaying all defined variables.