603: XCUSER_GETMAIN_ERROR

During Initialize_User processing, a GETMAIN request failed for the user control block (XCUSER).

System Action

Initialize_User processing is terminated. The return code from the GETMAIN is returned in subreason field-1 of the return area. The external CICS® interface issues message DFHEX0003 and issues an MVS™ user abend (0410) to force a SYSMDUMP.

User Response

Use the return code from the GETMAIN, with the dump, to determine why the GETMAIN failed. A possible reason for this is that the region size of the job is too small. If this is the case, increase the region size and restart the client application program.