Use the EDG3IIP1 USERMOD in SAMPLIB to update IATIIP1 to force DEFER for all tape requests. If you use EDG3UX71, you do not need to use EDG3IIP1. The EDG3IIP1 USERMOD updates IATIIP1 to mark tape allocations for deferred processing. This is equivalent to coding UNIT=(unit,,DEFER) as a JCL keyword.

Before you begin: Validate that the EDG3IIP1 USERMOD does not conflict with any other modifications to the IATIIP1 module.

Install the USERMOD by using SMP/E.