Dispatch archive task gets DC970033 with RC=4 Error=00540

Document ID : KB000074017
Last Modified Date : 05/04/2018
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Introduction:
We typically archive all of our reports to tape and don't have any problems. Today, CA Dispatch is attempting to archive a report and we are receiving the following errors:

IKJ56241I DATA SET HLQ...Dxxx.Txxx.D01 NOT ALLOCATED+      
IKJ56241I SPECIFIED UNIT IS UNDEFINED                                        
DC970033 Dynamic Allocation Error, RC = 004, Error = 00540, Info 0000000
DC970099 File: HLQ...Dxxx.Txxx.D01              
DC980078 ARCH1  - REPORT REQUEUED                                       
DC980095 Report: ABC, Job: 123, Job#: JOB30795        
Question:
What is causing these errors and how can we prevent them?
Environment:
z/OS
Answer:
CA Dispatch is attempting to archive the "HLQ...Dxxx.Txxx.D01" file to DISK, not to tape. This is indicated by the '.D01' suffix at the end of the DSN.

The ERROR CODE = 00540 indicates an invalid unit name on the dsname allocation.

When this error occurs, you will need to define a "valid" system esoteric DASD UNIT for the archive subtask to allocate, on the VSGMU215 - "Sysgen Archive Task Information Screen" (Option 9.A.S from the main menu).

CA recommends defining the valid DASD UNIT for all three archive subtasks (ARCH1, ARCH2 and ARCH3).

After defining a valid DASD UNIT on the VSGMU215 screen for each task, recycle the archive subtask(s).