Thanks for your answer. Your solution solve this problem, but when I put org.restlet.jar from the GWT edition, another problems appear : [ERROR] Line 37: No source code is available for type org.restlet.data.Preference<T>; did you forget to inherit a required module? [ERROR] Line 37: No source code is available for type org.restlet.data.MediaType; did you forget to inherit a required module?
[ERROR] Line 6: No source code is available for type org.restlet.resource.ClientProxy; did you forget to inherit a required module? I developed a project with two parts : - A REST Web service - A GWT client for this web service I think that REST Web service needs org.restlet.jar from GAE and that GWT client needs org.restlet.jar from GWT Should I have developed two projects. But, in this case, is-it possible to deploy two projects in the sameURL with GAE ? ------------------------------------------------------ http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2713403