X'5000' NONZERO RC ON CANCEL CALL TO QMGR

Explanation
 A nonzero return code was returned by the message
queue manager while attempting to cancel a message queue buffer that
is being discarded (the message is being scrapped).

Programmer response
 An error was detected while inserting
a message to the message queue, and cleanup processing is being performed.
The original error has already been logged in a prior type 6701-MRQE
log record, and the queue buffer area is being released (canceled).
The queue manager return code on the cancel call is in REG15 of the
REG14-12 save area. This is an internal IMS error.