Receiving the following error every couple hours and they come in bunces of 5 - 15 at a time. Shadow Copies is disabled on drives. Errors continue even when I enable shadow copies. Using NetBackup for system states. Help is appreciated.Log Name: ApplicationSource: VSSDate: 1/30/2009 8:26:16 AMEvent ID: 12289Task Category: NoneLevel: ErrorKeywords: ClassicUser: N/AComputer: domain controllerDescription:Volume Shadow Copy Service error: Unexpected error VSS_E_WRITER_STATUS_NOT_AVAILABLE. An older active writer session state is being overwritten by a newer session. The most common cause is that the number of parallel backups has exceeded the maximum supported limit. hr = 0x80042409.Operation: PostSnapshot EventContext: Maximum supported sessions: 64 Completed sessions: 8 Active sessions: 64 Aborted sessions: 0 Writer failed sessions: 0 New snaphot set: {9d0f78a7-27ff-40fa-bd2f-f3505d58e5d3} Old snapshot set: {e819d89e-45d9-4440-a6c9-345025686edd} Old operation: 1013 Old state: 5 Old failure: 0 Execution Context: Writer Writer Class Id: {a6ad56c2-b509-4e6c-bb19-49d8f43532f0} Writer Name: WMI Writer Writer Instance ID: {b5ab6461-fd34-4bf9-82fa-165e4198a5e8}

Hi Michael, Does this issue happens on Windows Server 2008? If so, please use Windows Server Backup feature to take backup to check if the issue still exist with the Windows Backup function.David Shen - MSFT

I'm getting the same issues. We're running W2k8 SP1 x64 in the VmWare environment and with NetBackup as the main backup utility. Tried doing the local backup. Still receiveing the same errors for: System WriterWMI Writer TerminalServerLicensing Are there any solutions to this? Thanks.Kiselev

unfortunately I can verify it happens on Windows2008 with Windows Server Backup on my SBS2008 installation. The curious thing is that I also get an alert telling me that the backup that occurs in 4 hours time has failed - see http://www.flickr.com/photos/absoblogginlutely/3903180471/ for a screenshot with the time of backup at 9am for a backup at 5am.

Is there any Solution for this Problem? I have the same issue on a 2008 Small Business Server. The Backup Target is full, but i assume that older Backups are being overwritten. The Event is logged for every Backup Source (Exchange, SQL, DHCP-DB, etc.) Any Suggestion? Kind Regards Christian

Hi Everyone I think that this HOTFIX are the solution, please check and read twice before use, is always a best practice to avoid other issues http://support.microsoft.com/kb/959962 My SBS2008 has the same error Kind Regards Emilio I WildeEmilio I. Wilde