122

Explanation
The operator canceled the job and requested a dump.

System action
The system ends the job.  The system writes a
dump to the data set described by the SYSABEND, SYSMDUMP or SYSUDUMP
DD statement in the canceled job step.

Programmer response
Find out why the operator canceled the job.
 Correct the error(s).  Resubmit the job.

Source
Master scheduler