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Not Valid Win32 Application. (Exception from HRESULT: 0x800700C1)

Dec 28 '12 at 09:50

As our application is running on the 64-bit machine having Windows 7 OS, system throws an error is not valid Win32 application. (Exception from HRESULT: 0x800700C1).

This error is generated in Windows application and Web application also. We are using .NET framework.


This is an "incorrect format" exception. See


For ASP.NET applications, make sure to copy the correct Chilkat assembly (32-bit or 64-bit) that matches the mode IIS is running (i.e. 32-bit or 64-bit).