E5143 Cmd Rej: GTT Set specified by OPTSN/OPCSN/CGCNVSN does not exist
The GTT set name specified by the optsn, opcsn, or cgcnvsn parameter must match an existing GTT set name.
Recovery
Display the existing GTT set information. Enter the rtrv-gttset command.
Re-enter the ent/chg-gta command that generated this error message, specifying a valid combination of parameters. Refer to the command description in Commands User's Guide and to the Database Administration - GTT User's Guide for assistance.