Backup failed unexpectedly


Backup fails with the following error in the Backup Logs :- 

Backup failed unexpectedly 

And the Agent Procedure logs (located on the 'Agent > Agent Logs' page) shows the following error :-
FAILED in processing THEN step 2, Execute Agent DLL Function, with error Spawn Failed, DLL = C:\Program Files (x86)\Kaseya\LNGSYS14996498929620\ExtDlls\Driver.dll, Arguments = --executeTask UnmountVolumes --commandCatalogPath "c:\kworking\KBU\Acronis Command Catalog.json" --messageTypeCatalogPath "c:\kworking\KBU\Acronis Message Type Catalog.json" --BackupRunPath="C:\Program Files (x86)\Kaseya\LNGSYS14996498929620\Backup" --volumes=all --log="c:\kworking\unplugLog.xml" --agentTempPath="c:\kworking" (Line 3)


- This error means the Driver.dll file under the agent install directory [ in this case C:\Program Files (x86)\Kaseya\LNGSYS14996498929620\ ] is either missing or corrupt.
- It can also be a permission issue - and that the credentials set on the 'Agent > Set Credential' page do not have sufficient privileges to run the file.



- Rename the Driver.dll file under this directory to Driver.OLD.dll, and replace the file with one from another agent with the same Operating System. Once replaced, run another backup.
- Ensure that the agent credentials for this agent are local admin credentials, that are also part of the backup operators group.
If the issue persists, review the following article for further assistance -

Applies To

Kaseya Backup (KBU)

R8, VSA 7.0, VSA 6.5

Have more questions?

Contact us

Was this article helpful?
0 out of 1 found this helpful

Provide feedback for the Documentation team!

Browse this section