C22

Explanation
The execute channel program (EXCP) processor abnormally
ended the job because the maximum number of EXCP/EXCPVR macro requests
permitted for an address space was exceeded.  The maximum number of
outstanding requests is defined in the ASCBXCNT in the address space
control block (ASCB).

System action
The EXCP processor abnormally ends the job.

System programmer response
  If the error recurs and an installation
provided program is not in error, look at the messages in the job
log for more information. Search problem reporting data bases for
a fix for the problem. If no fix exists, contact the IBM® Support Center. Provide the source program
listing for the job.

Programmer response
Check the job for a loop that could result
in EXCP/EXCPVR macros being issued repeatedly without intervening
WAIT macros. If the reason for the error cannot be determined, notify
the system programmer.

Source
Execute channel program (EXCP)