MRO between different CICS releases with a changed SVC number

If a CICS® TS 5.6 region, and other CICS regions from earlier releases, in the same MVS™ image use MRO, all the regions must use the CICS TS 5.6 SVC module.

If, when you install the CICS TS 5.6 SVC in the LPA, you give the SVC a number different from the number defined to the earlier CICS regions, you must respecify the SVC number. On each CICS region from an earlier release that will use the CICS TS 5.6 SVC, specify the new SVC number on the CICSSVC system initialization parameter.