Returns a message string associated with a specified status code .
The format for the $ZMESSAGE function is:
$ZM[ESSAGE](intexpr)
The integer expression specifies the status code for which $ZMESSAGE() returns error message text .
$ZMESSAGE() provides a tool for examining the message and/or mnemonic associated with a particular message code as reported in $ZSTATUS.
The $ZSTATUS Intrinsic Special Variable holds the message code and the message of the last non-Direct Mode GT.M error. For more information on $ZSTATUS, refer "Intrinsic Special Variables".