Specifying the ABL message (4GLMessages) log entry type turns on logging of ABL (Advanced Business Language) messages. It causes OpenEdge to write all ABL VIEW-AS ALERT-BOX messages to the log file. If the Debug Alert (-debugalert) startup parameter is used, the ABL stack is also written to the log file at the time of the message. Information is logged at Level 2 (Basic) and higher. Log entries generated for this type contain the tag 4GLMESSAGE.