Error TF80012

Today while trying to upload my Test cases to VSTS through an excel i got following error.

TF80012: The document cannot be opened because there is a problem with the installation of Visual Studio 2008 Team Foundation Office integration components. Please see the Team Foundation Installation Guide for more information.

It was working fine perfectly last week. I got this error with both VSTS 2008 and VSTS 2010.

Following solution i tried and it worked like magic:


Run the following command (from an Elevated Command Prompt if running on Windows Vista or later, or Windows Server 2008 or later):
Regsvr32.exe "C:\Program Files\Microsoft Visual Studio 8.0\Common7\IDE\PrivateAssemblies\TFSOfficeAdd-in.dll"

(Update the path, for me it was d: and Visual Studio 9 and 10)

Ref: http://support.microsoft.com/kb/947865