The service call used by the ABEND macro to identify an application problem.
ABEND macro expansion using SVC 13:
608 ABEND 4095,DUMP 609+ DS 0H 610+ LA 1,4095 611+ LA 0,128(0,0) 612+ SLL 0,24(0) 613+ OR 1,0 614+ SVC 13
and
615 ABEND 4094 616+ DS 0H 617+ LA 1,4094 618+ SVC 13