MFPLI00063U The length of a name or constant exceeds the implementation's limit. Check to see if all string constants are properly quoted with ' and that any contained 's occur in pairs. Also check for unbalanced /* */.

The maximum length of a PL/I token created externally in the source code is 3072.
Resolution:
Check that all string constants and comments are properly formed.
Module:
PASS1.PL1, LEXSTATE.IN