The exit must be link edited and placed into a load library accessible to your product region. In z/OS and z/VM systems, the exit must be link edited with the RENT option.
The name of the link edited exit module is identified to your product region by the SYSPARMS MAIEX02 operand.
The exit is typically written in assembler and can perform any processing required, including SVC calls and WAIT macros. This is because it operates under a subtask that is independent of the main product region task.
Note: Although executed under a subtask, the termination call to the exit when your region closes down is serialized. The termination call must complete before termination processing resumes.
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