Receiving the following error for the past month on a single server. 

* :VSS SYSTEM BOOT:\ 1 retry attempted

* :VSS SYSTEM BOOT:\ 5388:save: Failure status of writer ASR Writer - VSS_WS_FAILED_AT_PREPARE_SNAPSHOT

* :VSS SYSTEM BOOT:\ VSS SYSTEM BOOT: ERROR: VSS failed to process snapshot, error=0x800423f0: The shadow copy set contains only a

subset of the volumes needed by the writer to correctly backup the application.

* mbw-iis01.mbw.local:VSS SYSTEM BOOT:\ 7162:save: save of VSS SYSTEM BOOT:\ to .net failed

     * :  Failed with error(s)

All the other savesets for this server are working fine.

Checked all the writers and they all show no errors and stable.  Did the typical reboot for VSS issues several times and still the same issue.  Currenlty using the 7.6.3 Build 840.  Any ideas would be helpful

Thanks

David Rose