Classes inside a WAR file are visible only to other classes located inside the WAR file. Apparently the class in question was being accessed by a class outside the WAR file. Moving such a class into the EAR file makes it visible. The gory details can be found at http://docs.jboss.com/jbossas/guides/j2eeguide/r2/en/html_single/#d0e309. (Good luck understanding it, I have read it multiple times and still don't understand some of it...) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4054019#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...