During the upgrade of CA DB2 tools
Received a RC=8 for the 0001 job as this tried executing the DB2PDDL DDL.
This generated DDL was invalid after the RC/Compare job in installation job 0000.
In the DDL file had the following for the creation of the tablespace and tables. Indexes contained DDL.
RCO0013E: Internal Error service(ZOMPDCNV) RC=12 ;88 ,156
Release : 20.0
Component : CA RC/Compare for DB2 for z/OS
RCO0013E: Internal Error service(ZOMPDCNV) RC=12 ;88 ,156
Means you need access to the OMVS segment.
You'll need to check with your security team to get the required access.