X'10AC' DFSLUMIF BLDPRE ERROR

Explanation
 A nonzero return code was returned by the IMS APPC LUM services routine while
trying to build a new APPC prefix for an APPC message.

Programmer response
 The APPC message being processed
is in the I/O area, and is also pointed to by REG6 in the register
save area. The nonzero return code from the LUM services routine is
in REG15. This is an internal IMS failure.