Today IBM announced the end of marketing (eom) for z/VSE 5.2 and related products. The eom is planned for March 13, 2017 . The affected products are: z/VSE 5.2 z/VSE Central Functions 9.2 CICS TS for VSE/ESA 1.1.1 IBM IPv6/VSE 1.1 IBM TCP/IP for VSE/ESA 1.5 Application Pak feature After the eom date those products can no longer be ordered. That is if you plan to migrate to z/VSE 5.2, please order those products before the eom date. The end of marketing announcement and more details are here .