To retry VSS snapshot creation, create the following registry on Backup Exec media server:

Warning: Incorrect use of the Windows registry editor may prevent the operating system from functioning properly. Great care should be taken when making changes to a Windows registry. Registry modifications should only be carried-out by persons experienced in the use of the registry editor application. It is recommended that a complete backup of the registry and workstation be made prior to making any registry chang

1. Open regedit on the Backup Exec server.
2. Navigate to
   HKEY_LOCAL_MACHINE\SOFTWARE\Veritas\Backup Exec For Windows\Backup Exec\Engine
     - or -
   HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Backup Exec For Windows\Backup Exec\Engine
3. Create new key called Besc
4. Navigate to
   HKEY_LOCAL_MACHINE\SOFTWARE\Veritas\Backup Exec For Windows\Backup Exec\Engine\Besc
     - or -
   HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Backup Exec For Windows\Backup Exec\Engine\Besc
5. Create the following registry values:

Name: UseSnapshotEngineRetry
Type: DWORD
Data: 1 - Enable retrying snapshot creation
        0 - Disable retrying snapshot creation (default)

Name: SnapshotEngineRetries
Type: DWORD
Data: Retry count
        The default value is 3.

Name: SnapshotEngineWaitTime
Type: DWORD
Data: Time interval to next snapshot creation in milliseconds
        The default value is 120,000 (decimal, 2 minutes.)

Restarting the Backup Exec services is not required.