>I have an application that I am updating. When I build it to an exe, It errors when it tries to define classes. ie cannot find them. All class
>libraries are included in the project. If I move my classes directory into the application directory all is fine.
>
>Subclasses and parent classes are available.
>
>Any ideas what I might have done to change things?

Try setting the path to include all paths correctly before building the application. It may also help to manually compile every class library.