This is actually the first exception that gets reported. There are several others following it either similar or complaining that they are related to this one. I have done some experimentation but trial and error and have located the problem to an Action/Session Bean class. If I delete it from the build the project deploys, if I include it then it doesn't. It always gives this exception which doesn't seem to be very helpful. All the code compiles OK. I shall keep plugging away. The most frustrating thing is that there don't seem to be any tools or hints as to what is going wrong. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4042760#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...