IEE461I
UNIT dev CANNOT BE DEFINED AS AUTOSWITCH BECAUSE IT IS A JES3-MANAGED TAPE.

Explanation

JES3-managed tapes cannot be automatically switchable.

In the message text:
dev
The device number

System action

The system continues processing.

Operator response

Choose a device that is not managed by JES3

Source

Master scheduler

Module

IEECB857

Routing code

Note 18

Descriptor code

5