Running CICSPlex SM Version 3.1 and an earlier release concurrently

You can run CICSPlex SM Version 3.1, Version 2.3, Version 2.2, and Release 4 at the same time, with interconnected CMASs at different levels. The ability to do this allows gradual migration of the environment to Version 3.1. However, in CICS® TS for z/OS®, Version 3.1, a CICSPlex® SM CMAS will run only in a CICS system at the same release level.

There are some conditions for running Version 3.1 with Release 4 that you should understand. Read the following section, Conditions for running CICSPlex SM Version 3.1 and earlier releases concurrently, then read Performing migration procedures to understand how to migrate your supported releases before attempting the extra migration steps.

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