Have you read the manual description for APC0 and followed the advice in it, especially what I've highlighted?
A serious error occurred in a call to the program manager domain when trying to link a system program.
CICS terminates the task with a transaction dump.
Use the dump to investigate why the error occurred. Look at the trace records prior to the error for abnormal conditions in processing the PGLK domain call. This may be due to a problem with directory manager, loader, or storage manager. Check the program size. It may be necessary to increase the overall size limits of the DSAs or EDSAs.
DFHEICRE, DFHEIDEF, DFHEIDEL, DFHEIINS, DFHPCP, DFHMCY