Check to make sure the script VSAMVVDS is running and has to be run for every DTOC, and has to complete before any of the DB2 SYSTEM SCRIPTS can run.
DB2NAMES in 12.6 contains only one Object, but Rel 14 contains 4 objects. When DB2names Script for 14 is run, the objects are 1) not created, and 2) the system script was updated to remove 3 of the object lines. You can recreate the DB2NAMES script with only the DB2NAMES object, and create 3 other system scripts for the other 3 objects; DB2TABLS, DB2DETAL and DB2SYST.
There is an order required in executing/loading the system scripts. please try:
Please review this chapter and make sure all steps are followed: "Configure for CA Vantage Database Option (DB2)" under link:
6. Use the Config Client to set appropriate system parameters:
SUDB2 (Y) - Activates DB2 support
DB2SUBS (sub1,sub2,...,sub8) - Include local DB2s only DB2SUBS (<DB2LIST>) - Include remote DB2s
The DB2SUBS parameter is described in detail under link:
Some points the documentation misses is that VNS12030, and DB2Names has to be run for every release of Vantage, and not skipped.