In a JES3 global or local configuration, a z/OS UNIX application might experience the following situation:

• One system can complete conversion and interpretation and another system can run the job. If all systems do not have z/OS UNIX, the job might be assigned to a system without z/OS UNIX. In this case, the job will fail. To prevent this problem, use a JES3 //*MAIN statement with a SYSTEM keyword to direct the job to a system with z/OS UNIX.