V7 support banner update throws class exception not found exception

I am using Eclipse and I am trying to update my v7 jar support. I have appcompat v7 as a project in my workspace that links to other projects. I tried to use the v7 type (instead of the old deprecated v4 type) which was not resolved when trying to import it. Then I updated my v7 jar in the appcompat libs project folder, which fixed the unresolved import issue, but when I try to run the project I get:

java.lang.NoClassDefFoundError: android.support.v7.app.AppCompatDelegateImplV14

      

        
        
        
      

    

This exception is thrown on the line super.onCreate();

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Any idea why and how to solve it?