MCH3601 on WRKJOB record locks on V5R1M0 latest cum

Had an odd error this morning as I was monitoring a job for record locks.  I
had gone to WRKJOB option 12 for locks, then F10 for record locks.  I was
pressing F5 to refresh the screen.  When the job ended, I was no longer
looking at the same screen as I would have expected.  Any ideas?  Or should
I call IBM and report it as a software problem?  (We don't have software
support, so they always try to bill us for things like that.)  TIA!

I got the following in my joblog:

 Message ID . . . . . . :   MCH3601

 Message . . . . :   Pointer not set for location referenced.
 Cause . . . . . :   A pointer was used, either directly or as a basing
   pointer, that has not been set to an address.


 Message ID . . . . . . :   CPF9999

 Message . . . . :   Function check. MCH3601 unmonitored by QDBJOBRL at
   statement *N, instruction X'0116'.
 Cause . . . . . :   An escape exception message was sent to a program which
   did not monitor for that message. The full name of the program to which
the
   unmonitored message was sent is QDBJOBRL  . At the time the message was
sent
   the program was stopped at higher level language statement number(s) *N.
If
   more than one statement number is shown, the program was a bound program.
   Optimization does not allow a single statement number to be determined.
If
   *N is shown as a value, it means the actual value was not available.
 Recovery  . . . :   See the low level messages previously listed to locate
the
   cause of the function check.  Correct any errors, and then try the
request
   again.