Microsoft Office Interop dll fails when application is deployed on server
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I have used Excel and Powerpoint Interop Dlls in my web application, they run fine on local machine. However when I deploy it on IIS the application breaks giving following error

    Retrieving the COM class factory for component with CLSID {00020820-0000-0000-C000-000000000046} failed due to the follo
    wing error: 80040154.

