Variable-substitution exit (on JCL or job definition variable)

A Variable-Substitution exit is invoked in the Controller Address Space (Active) or during the daily planning process. Invokers are:

• The Workstation Analyser subtask and the General Service tasks, if you are submitting a job contained in the job library.
• The job definition parsing process, if you are submitting a job definition contained in the SCRPTLIB library, using the MCP dialog or running a Daily Planning batch job.

During the running of the exit other tasks in the address space are prevented from reading and updating the Current Plan.