Limitations enforced by system exits

Make sure you are not allowing system exits IEFUSI or IEALIMIT to control OMVS address space region sizes. A possible way to accomplish this is by coding SUBSYS(OMVS,NOEXITS) in SYS1.PARMLIB(SMFPRMxx).

SYS1.PARMLIB(SMFPRMxx) values can be checked and activated with the following console commands, as described in MVS™ System Commands (GC28-1781):
  1. DISPLAY SMF,O
  2. SET SMF=xx