Asp.net mvc deployment 500 - Internal server error

Question

I have a asp.net MVC application i am getting 500 - Internal server error. My code is working fine what i have figured out is whenever i am initializing the Microsoft word class then i am getting this error if i remove the initialization part then it works fine any suggestion??

 //Create new instance of word and create a new document
                Microsoft.Office.Interop.Word.Application wordApp = new Microsoft.Office.Interop.Word.Application();
               // Word.Document doc = null;

                //Properties for the new word document, so everything happens in the background. If this isn’t set all the word documents will be visible
               // object readOnly = false;
               // object isVisible = false;

Answer 1

You must be missing Microsoft.Office.Interop.Word.dll or its dependent file from your deployment.

You can get detailed error message by disabling customErrors in web.config file of deployment

<configuration>
    <system.web>
        <customErrors mode="Off"/>
    </system.web>
</configuration>