I'd love to ask about my issue with ant script. I have two GWT projects and one depends on the other. I'm trying to compile them with ant script, but I'm failing due to: [java] [ERROR] Errors in 'file:/$PATH/$CLASS_NAME.java' [java] [ERROR] Line 29: No source code is available for type $INHERITED_INTERFACE; did you forget to inherit a required module? while $INERITED_INTERFACE is from the library the compiled project depends on and $CLASS_NAME is a class that implements the interface. I tried it simple, but it's not working: but it can't go pass the errors. I've also inherited the GWT library with: ... Not really sure what's wrong. Common.gwt.xml is there and it points client and shared as source packages. Could anyone help with that?