CMS VSAM and Access Method Services
User Requirements and Considerations
Because the CMS support of VSAM and access method services is based on DOS/VS access method services, you must order a DOS/VS system (Release
31 and above and use the DOS/VS starter system when you install the eMS VSAM support. In order to install CMS VSAM from the DOS/VS Release 33
starter system, you must be sure to use the current level of VM/370 installation files (Release 3 PLC 8 or later). Also, the CMS/DOS support must be installed before you install VSAM under CMS. Distribution of VSAM and CMS VM/370 does not distribute the DOS/VS VSAM and access method services
routines that it uses. You are responsible for ordering Release 31 and
above DOS/VS systems. The VM/370 starter system has an installation EXEC procedure, VSAMGEN, that generates CMS support for VSAM and access
method services using a restored DOS/VS starter system. Part 1. Planning for system Generation 33

34 IBM VM/370 Planning and System Generation Guide