"Unable to cast COM object..." when exporting to Excel from Team Explorer 2008
Action
Using Team Explorer 2008 you try to open a work item or collection of work items in Microsoft Excel via the menu item "Open Selection in Microsoft Excel" or "Open in Microsoft Excel".
Result
You receive the following error message:
Unable to cast COM object of type 'Microsoft.Office.Interop.Excel.ApplicationClass' to interface type 'Microsoft.Office.Interop.Excel._Application'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{000208D5-0000-0000-C000-000000000046}' failed due to the following error: The interface is unknown. (Exception from HRESULT: 0x800706B5).
Resolution
You may be able to resolve this error message by resetting the Visual Studio 2008 environment:
Open a command prompt and CD to %programfiles%\Microsoft Visual Studio 9\Common7\IDE
(path assumes you have Visual Studio 2008 installed in the default location; adjust accordingly).Execute the following command:
devenv.exe /ResetUserData
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