On recent versions of AIX (AIX 7.1, AIX 6.1), the operating system can generate the process ID number more than 7 digits by default. In TXSeries, if the process ID generated for the CICS process is beyond the 33554431 (2^25 -1) then following scenarios might fail
-> Starting/Stopping the SFS server, Region with cicscp command
-> sfsadmin, cicssdt, tkadmin and any region or command accessing the SFS can also fail with ERZ-rpc-0214
-> region to region communications with ppc_tcp and ppc_gateway might fail
-> Region might not be reachable using cicslterm or cicsteld
User can identify this issue if they notice following messages in the region console file and any of the CICS process ID number is greater than 33554431.
2 00180 13/09/03-12:36:44.834085 28044017 W trdce_ServerUnregister failed (ERZ-rpc-0214: Not registered in endpoint map)
You can solve the problem by applying the APAR IV07880 on TXSeries 6.2 and APAR IV01797 on TXSeries 7.1.