X'E020' QMRG0 - INVALID FUNCTION PASSED TO QC LOAD AND QUERY QUEUE SPACE NOTIFICATION TABLE

Explanation
 An invalid call was made to DFSQMRG0. Register 0 did not contain X'28' (MRQCLEAN), X'34'
(MRQCMD), or X'38' (MRQGCMD).

Programmer response
 The REG0-REG15 save area contains the function
code.  REG14 is the address of the caller of DFSQMRG0 (BALR REG).
 Trace the call back to the caller of DFSQMRG0.