EDG6104E

Explanation
Either the DFSMSrmm backup and recovery utility,
or the control data set utility, has encountered an error performing
I/O to the DFSMSrmm control data set. The message text provides information
about the attempted I/O.
In the message text: return_code
The return code that is returned by VSAM in register 15, or it
is a DFSMSrmm internal return code. Possible values for the DFSMSrmm
internal return code are: 252 - The record read from the control data set is not a DFSMSrmm
supported record.
255 - The I/O request made is not supported by DFSMSrmm.

reason_code
The RPL reason code returned by VSAM or zero for DFSMSrmm internal
return codes
vsam_key
The key of the VSAM record that was the subject of the request

System action
The program fails.

Operator response
None.

Programmer response
Review the message text and refer to z/OS DFSMS Macro Instructions for Data Sets. 
This error is the result of a VSAM processing error. The
DFSMSrmm control data set might be damaged. For DFSMSrmm internal
return codes, the action depends on the return code.
For return
code 252, your control data set contains records that are not supported
by DFSMSrmm. You should ensure that the VSAM data set being used contains
only valid records. You should only use the DFSMSrmm supplied and
supported utilities against the DFSMSrmm control data set.
For
return code 255, report the error to the IBM® Support
Center. If other VSAM messages have been issued, refer to these messages
for action to be taken.

Source
DFSMSrmm

Module
EDGBKUP

Routing code
11

Descriptor code
7