When you start your CICS system, the startup fails with messages: IST967I ALESERV ADD FAILED FOR applid; RC 0C RS 00000000 and DFHSI1572 applid Unable to OPEN VTAM ACB - RC=00000008, ACB Code=14
You started more CICS systems on a LPAR using VTAM (z/OS Communications Server) persistent sessions than z/OS could support. VTAM persistent session support makes use of the z/OS dataspace capability registering session information into a dataspace. So, it requires one dataspace per CICS system. There might also be other components that make use of z/OS dataspaces. However, there is a limit regarding the number of dataspaces on a LPAR which is about 500 and this limit had been reached.
Resolving the problem
- Identify those CICS systems that do not require VTAM persistent session support, such as test and development systems.
- Then change the system initialization table (SIT) parameter for those systems specifying PSTYPE=NOPS. Also, make sure to have the SIT parameter PSDINT either omitted or set to zero.
- Recycle the subset of the CICS systems that have been changed and were currently running.
- Now you should be able to start the CICS that has failed to come up.
|Host Transaction Processing||CICS Transaction Server||Terminal Control||z/OS|
CICS/TS CICS TS CICS Transaction Server