A new checkpoint activation level, which is called z11, is available for JES2 release V1R11. The current checkpoint level is z2. JES2 needs certain conditions to activate to the z11 checkpoint level: refer to JES2 z/OS V1R11 checkpoint activation.

Before activating to JES2 release V1R11, you should meet certain conditions if your installation is using the following JES2 exits or macros: refer to JES2 z/OS V1R11 exits and macros.