Application dialogs that were created to run under earlier versions of ISPF will run under z/OS V2R1.0 ISPF with no change.

All the components of ISPF (DM, PDF, SCLM, and the Client/Server) are considered one element in all releases of z/OS®. Attempting to run one of the components from one release of z/OS with a component from a different release of z/OS or with any component of a standalone release of ISPF or ISPF/PDF is not supported.