Makes the Compiler check the sequence numbers in columns 1 through 6 and identify source lines that are out of sequence.
>>-.---.-.----.--SEQCHK-------------------->< +-/-+ +-NO-+
None
| Default: | NOSEQCHK (Dialect ) |
| Phase: | Syntax check |
| $SET: | Any |
SEQCHK sets NORESEQ immediately.
Set to NOSEQCHK at end by SOURCEFORMAT"FREE".