Installing newest release CICS Type 3 SVC and DFHIRP modules supplied through maintenance

Ahead of the general availability (GA) of a new CICS® TS release, IBM® may ship maintenance that contains the newest release type 3 SVC module and the IRP module required for MRO communications, on currently supported CICS TS releases, to facilitate the evaluation or quicker adoption of a new CICS release. You can opt in and schedule an upgrade of these LPA modules to fit in with your scheduled z/OS® IPLs ahead of the CICS GA.

About this task

The supplied new release modules are named as DFHNCSVC and DFHNIRP in the SDFHLPA library. Unless you opt in as instructed below, application of this maintenance has no effect. To utilize the new release modules, you must rename them for CICS use.

Use SMP/E to rename the CICS SVC module and IRP module. Use the SMP/E RENAME command to inform SMP/E of the change to the name of the CICS SVC module. Therefore, if you later use SMP/E to apply service to that module, the service is applied to the renamed module in the LPA.

The procedure below requires you to create two SMP/E USERMODs. For more information about how to code a USERMOD, see SMP/E for z/OS Reference.

Procedure

  1. Create and apply an SMP/E USERMOD to rename the existing CICS SVC and IRP modules to a name of your choice: 
    ++USERMOD (umod1).
++VER(C150) FMID(HCI7300).
++RENAME (DFHCSVC) TONAME(old_csvc_name).
++RENAME (DFHIRP) TONAME(old_irp_name).
  2. Create and apply an SMP/E USERMOD to rename the new release CICS SVC and IRP modules: 
    ++USERMOD (umod2).
++VER(C150) FMID(HCI7300) PRE(umod1).
++RENAME (DFHNCSVC) TONAME(DFHCSVC).
++RENAME (DFHNIRP) TONAME(DFHIRP).

What to do next

When the renaming is complete, perform an IPL of the z/OS system to activate use of the new release modules. These modules are downward compatible with all existing CICS TS releases.

When the new release is made generally available and installed, you can add the SDFHLPA library for the new release to the LPA concatenation as normal but an immediate IPL is not required. The type3 SVC and IRP modules applied by this maintenance procedure are the same as the new release modules, so are sufficient until the next scheduled IPL, at which time you can revert to using the new release SDFHLPA library. The other CICS modules that are contained in SDFHLPA are not release specific and are upward and downward compatible, so earlier release modules operate correctly with the new GA release.