DFSXLUM0

APPC/IMS issues message DFS1959E when a severe internal error occurs. If you receive this message, contact IBM®® Software Support with the module number and reason code supplied in the message. Reason codes for message DFSXLUM0 are given.

RC
Description
5009
Unknown return code from z/OS® clean address space call.
5010
Unknown return code from z/OS unidentify call.
5011
IXCLEAVE unsuccessful.