0I28D DEVICE NOT OPERATIONAL X'cuu'
Cause: $$BUFLDR attempted to access the device with the address cuu, but the device was
either off line or not powered up.
System Action: The system waits for an operator response.
Programmer Action: none.
Operator Action: Make the device operational and respond RETRY, or
Respond IGNORE or press END/ENTER if the device is not to be used.
If the device cannot be made operational, call your IBM customer engineer.
Used with Courtesy and Permission of International Business Machines, Inc.