GWT Compile "Add an entry point module" dialog

Question

Can anyone explain where the Eclipse GWT plugin defines it's entry points?

In an attempt to get my old GWT project working again with GWT 2.0, I created a default GWT 2.0 project in Eclipse and was able to run it successfully. It's the one that asks for a name and calls the 'greet' servlet on the server, which responds etc... so far so good.

I then ported all the classes from my older maven GWT project over to this new GWT project in the hopes of getting the RPC calls to work. It had many dependencies, so I also copied over the maven pom.xml, commented out all of the gwt related plugins in the pom, and managed to get the Eclipse M2Eclipse maven pluging to recognize the pom and adopt all of the maven dependencies. All of the issues in Eclipse are now resolved and it looks good to go.

However, when I click on the GWT compile icon for the project, it pops up a "GWT Compile" dialog now asking me to "Add an entry point module". There are no entry points listed to choose from in this dialog. This is frustrating because I kept the exact same GWTApp.gwt.xml and moved my code into the previously-working auto-generated GWTApp.java class.

I can't imagine why the Eclipse plugin doesn't look in the GWTApp.gwt.xml file to figure out what the entry points are.

Can anyone explain how these entry points are defined or suggest why the project stopped working?

Thanks!