X'A024' QMR50 - UNLOAD - SELECT MESSAGE ERROR

Explanation
 The call to DFSQMR20 to select a message returned
an error code of 8 or higher.

Programmer response
 REG15 in the REG0-REG15 save area contains
the return code. CMDQNAME in MRQWORK is the queue name being processed.
MRQUNLMC in MRQWORK points to the unload message being selected. Trace
the problem to select routine DFSQMR20.