Unable to cast COM object of type 'System.__ComObject' to interface type 'EnvDTE.IVsExtensibility'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{3C536122-57B1-46DE-AB34-ACC524140093}' failed with HRESULT: 0x80004002 (No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE))).
Michael

How do I ADD A NEW DATA SOURCE ????? - ERROR MESSAGE included.
Vikas Hiran
Please do not post the same question multiple times in the same or multiple forums. I have removed your previous posts.
Please post a bug report on the Microsoft Product Feedback Center with steps to reproduce it.