Dynamic definition of MSC resources fallback considerations

You can fall back from an IMS system that has dynamic definition enabled for MSC resources to an earlier version of IMS.

Complete the following procedure to fall back from an IMS system that has dynamic definition enabled for MSC resources to an IMS system that does not have dynamic definition enabled for MSC resources:

1. Keep your stage 1 system definition synchronized with dynamic definition of MSC resources.
2. Run system generation for stage 1 system definition that includes MSC resources, which are the following:
   1. MSPLINK, MSLINK, MSNAME, and NAME macros
   2. IMSCTRL macro with MSVID and SYSTEM=(MSVERIFY) parameters specified
   3. APPLCTN and TRANSACT macros with the SYSID parameter specified
3. Restore old copies of MSC user exits.
4. Restore old copies of automation programs that issue QUERY LTERM, QUERY MSLINK, QUERY MSNAME, and QUERY MSPLINK commands and parse the output.
5. Remove new MSC parameters from the DFSDFxxx member of the IMS PROCLIB data set.
6. Cold start IMS at a previous IMS release level.
7. Complete other pertinent tasks related to falling back to a previous version of IMS.
8. Disable Common Service Layer (CSL) with the Structured Call Interface (SCI) and the Operations Manager (OM) if these are not needed for any other IMS function.
9. Confirm that dynamic definition is disabled for MSC resources by issuing the QUERY MEMBER TYPE(IMS) command, and ensuring that the command output does not include DYNMSC in the local attributes.