There is an annoying edge case with Maven frameworks and resource loading in Eclipse. I've never investigated it too deeply, as the workaround is simple: in your case, you need ERModernDefaultSkin.framework as an open project in your Eclipse workspace, and the Maven version needs to match exactly to what your app depends on. When there's a version mismatch, it doesn't seem to be able to load resources out of the JAR in your ~/.m2/repository.