The SUMOVFL option specifies the action to be taken if a summed or averaged field overflows or underflows during SUM, DUPKEYS SUM, or DUPKEYS AVG processing.
RC0
The delivered default instructs MFX to issue a WER049I warning message and continue processing. A return code of 0 will be returned if not overridden by a higher return code set for another reason. The WER049I will only be issued on the first occurrence of the overflow or underflow.
RC4
Instructs MFX to issue a WER049I warning message and continue processing. A return code of 4 will be issued if not overridden by a higher return code set for another reason. The WER049I will only be issued on the first occurrence of the overflow or underflow.
RC16
Instructs MFX to issue a WER049A message and to terminate processing with a return code of 16.