Fallback step 3: Reconnect TSO, IMS, and CICS to Db2 12

After you reactivate your Db2 12 code during fallback, reconnect TSO, IMS, and CICS® to Db2 12.

Procedure

To reconnect TSO, IMS, and CICS to Db2:

  1. Re-establish your Db2 12 TSO logon procedures and JCL.
  2. For CICS connections, complete one of the following actions:
    • If you overwrote the load module during migration to Db2 13, reassemble the resource control table (RCT) with the Db2 12 libraries.
    • If you did not overwrite the load module, change the STEPLIB statements in Db2 CICS jobs so that they refer to the Db2 12 libraries.
  3. For IMS connections, change the STEPLIB statements in Db2 IMS jobs and address spaces so that they refer to the Db2 12 libraries