Error message

ERROR Agent - System.Runtime.InteropServices.COMException (0x80042318): Exception from HRESULT: 0x80042318 at Alphaleonis.Win32.Vss.WaitCheckAndReleaseVssAsyncOperation(IVssAsync* pAsync) at Alphaleonis.Win32.Vss.VssBackupComponents.GatherWriterMetadata() at SOSOnlineBackup.Client.Library.Core.ShadowCopy.VssBackup.Init(IVssImplementation VSSImpl) at SOSOnlineBackup.Client.Library.Core.ShadowCopy.VssBackup..ctor(Boolean componentMode, Guid VSSWriterId) at SOSOnlineBackup.SAgent.MSSql.MSSqlBackupPerformer.RunBackup() at SOSOnlineBackup.SAgent.Agent.#=qmgPA_v29nwyXxtvLf9bzHg==(IBackupSession #=qXhnlys\$fBQFZDxm9B0T8qQ==)

Error description

The error can be found in the file SAgent.Service_vX.X.X.log in the application folders: C:\ProgramData\Online Backup and Recovery Manager\Logs or C:\ProgramData\SOS Online Backup\Logs.

Usually, the error code appears in Event Viewer.

Steps to resolve

Restarting the following VSS services may correct the issue: COM+ Event System Microsoft Software Shadow Copy Provider Windows Management Instrumentation Volume Shadow Copy.

Sometimes, re-registering the following VSS DLLs from a command line prompt will help resolve VSS problems (requires reboot).

cd %systemroot%\system32
net stop VSS
net stop swprv
regsvr32 /s ole32.dll
regsvr32 /s VSS_ps.dll
regsvr32 /s oleaut32.dll
VSSvc /register regsvr32 /s /i swprv.dll
regsvr32 /s /i eventcls.dll
regsvr32 /s es.dll
regsvr32 /s stdprov.dll
regsvr32 /s VSSui.dll
regsvr32 /s msxml.dll
regsvr32 /s msxml3.dll
regsvr32 /s msxml4.dll
net start swprv
net start VSS

Once the DLLs are registered, reboot the server.

If any DLL cannot be registered, restart the server, and then register the DLL again.

For more information, see the related thread on Microsoft TechNet.