In this customer's case, the abend was caused by a Time of Day rule triggering before JES initialization completed. Recommend reviewing the log at the time of abend.
If encountering this situation, a message similar to this should appear shortly before the abend in the log:
18:50:00 OPS3900O RULE TOD.rulename FOR TOD 202x/xx/xx 18:50:00 SET
.
.
.
18:50:00 OPS3092O SUBMIT ENDED DUE TO ERROR, SYSTEM ABEND CODE 013
Scrolling further up the log from the OPS3900O message, there will be no evidence of the JES initialization completing prior to when the rule was set to trigger.