Suboption can be:
ALL | Display all messages. |
[NO]UNDETerminedForms | Display (default), or do not display, a message when a compiled rule AST node for an undetermined form (UNDETx) executes. |
[NO]UNIMPLementedSETs | Display (default), or do not display, a message when a % SET statement, that is obsolete or not implemented, executes. |
[NO]EVALSTartLine | Display (default), or do not display, a warning message when a non-rule line begins with a left evaluation bracket. A warning is useful here because the line is interpreted as text, that is, a non-rule line). |