I'm trying to create an Excel document via C#. When I run the application, it gives the following error:
Unable to cast COM object of type 'System.__ComObject' 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: Error loading type library/DLL. (Exception from HRESULT: 0x80029C4A (TYPE_E_CANTLOADLIBRARY)).
It was working fine before I've upgraded Visual Studio from 2010 to 2012. I've also upgraded Office from 2010 to 2013.
I was struggling with this error for a few days . I've finally found the solution.
It occurs because I’ve installed Office 2013 instead of Office 2010 which I was using with old version of my project. After I upgraded my Office, the project was no longer able to link Excel reference.
Even though I referenced new Excel library which is 15.0, it didn't work.
What I did is that:
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