Load data from release 11 to release 12 fails with 0P79I INVALID FIRST CCW IN A DASD CHANNEL PROGRAM

Document ID : KB000092642
Last Modified Date : 20/04/2018
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Issue:
I just installed Datacom release 12 on our test machine but still have release 11 on production.
I am trying to load data from our production machine to our beta machine which like our test machine has release 12 on it. I am getting the following error:

0P79I INVALID FIRST CCW IN A DASD CHANNEL PROGRAM 
Environment:
z/VSE  
CA Datacom 12.0 and 11.0
Cause:
SYS005 is assigned to disk  in the CSORT procedure that is used in the JCL.
DBUTLTY LOAD with DEVICE=TAPE requires SYS005 to be assigned to the tape drive.
 
Resolution:
Use another logical unit SYS number in the CSORT proc.