Virtual machine backup fails with error "Final Error: 0x80042306 - 0x80042306 (2147754758)"


Virtual machine backup fails with error "Final Error: 0x80042306 - 0x80042306 (2147754758)"


Error Message

V-79-32772-8966 - Final Error: 0x80042306 - 0x80042306 (2147754758)
V-79-10000-11217 - VSS Snapshot error. The Microsoft VSS snapshot failed. Make sure that all provider services and tasks are running. Check the Windows Event Viewer for details.

SGMon debug error shows

BENGINE:  [02/22/10 22:32:34] [5948]     ndmpcSnapshotPrepare2: Snap shot error. ErrorCode: 0x80042306 ErrorLevel: 2 Provider: 2 

Snapshot Error:

Volume Shadow Copy Error 0x80042316 - snapshot set in progress 



This warning is given typically when the Volume Shadow Copy Service (VSS) is unable to run due to another instance of VSS already running.



  1. More than one backup program installed
         If there are more than one backup program installed on the machine, disable all of the programs except for one and try run the backup job again. 
  2. Scheduling Conflict
    Having two backup jobs running at the same time within BackupExec both trying to run VSS can cause this error to occur. Please change the time one of the backup jobs is scheduled to start so that a conflict isn't likely to occur. 
  3. Previous VSS snapshot has not completed properly and is still running
    Stop and Re-start the Volume Shadow Copy service
    Reboot the server. 
  4. Re-register .dll files associated with VSS service.
    Open command prompt and change directory to windows/system32 and type in the following commands

    regsvr32.exe /i eventcls.dll
    regsvr32.exe /i swprv.dll
    regsvr32.exe vssui.dll
    regsvr32.exe vss_ps.dll
    regsvr32.exe msxml.dll
    regsvr32.exe msxml2.dll
    regsvr32.exe msxml3.dll
    regsvr32.exe ole32.dll
    regsvr32.exe oleaut32.dll
    regsvr32.exe es.dll
    regsvr32 stdprov.dll
    Vssvc /Register 
  5. Apply the following hotfix if the Virtual machine is Windows Server 2003.
        An update is available that fixes various Volume Shadow Copy Service issues in Windows Server 2003 -
  6. Contact Microsoft Support for additional assistance resolving VSS error. 




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