I have the following problem on Windows Server 2003 R2 with SP2. I see the following events after calling Unsubscribe for a custom VSS writer after querying the VSS writer components. Any idea why? Event Type: Warning Event Source: EventSystem Event Category: (52) Event ID: 4354 Date: 1/31/2011 Time: 8:04:25 AM User: N/A Computer: TAHITI1 Description: The COM+ Event System failed to fire the RequestWriterInfo method on subscription {7446911A-B0F1-47EC-96E2-9D2BF5D1566F}-{00000000-0000-0000-0000-000000000000}-{00000000-0000-0000-0000-000000000000}. The subscriber returned HRESULT 80010105. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Event Type: Error Event Source: EventSystem Event Category: (52) Event ID: 4616 Date: 1/31/2011 Time: 8:04:26 AM User: N/A Computer: TAHITI1 Description: The COM+ Event System caught an access violation at address 0x000007FF7BB5D5E9 within method RequestWriterInfo of interface {F2B41165-A791-4C1F-9820-8BE45C784E32}. The method attempted to access address 0x00000000ABCD0025. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Hello, did you check already with existing updates: http://support.microsoft.com/kb/940349 http://support.microsoft.com/kb/826936 http://support.microsoft.com/kb/913648 http://support.microsoft.com/kb/888603 http://support.microsoft.com/kb/891957 http://support.microsoft.com/kb/887827Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

I have a x64 Windows 2003 R2 with SP2 (English) I verified and i have installed the following hotfixes KB940349-v3 I do not have installed 826936 (requires SP1, and it is not available for x64) 913648 (requires SP1) 888603 (no x64 fix is available) 891957 (requires SP1) 887827 (x64 hotfix is not available and it requires SP1) Please let me know what hotfixes are needed.

On Win 2003 use only CVssWriter::Unsubscribe, and do not call destructor of the custom writer inherited from CVssWriter base class after Unsubscribe was already called. On Win 2003 x86 if you call destructor after Unsubscribe then VSSAPI.DLL will crash. Please confirm.

Hi, Whether there is antivirus application installed on the Windows Server 2003 R2 with SP2, please try to disable it to see whether the issue still exists. There appears to be a known issue with tracing enabled that generates Event ID: 4616. Will it be possible to install the update mentioned in this KB then we’ll need to see if we can capture the issue again. KB951568 “VSS-based backup operations may fail if VSS tracing is enabled on a Windows Server 2003-based computer that has hotfix 940349 applied” http://support.microsoft.com/kb/951568/en-usTechnology changes life