Sorry for this huge post, it's not just the stack after the error but part of the server log, first I thought it is also interesting Now what does these two lines means: Caused by: java.lang.IllegalArgumentException: EntityManagerFactory not found in JNDI Caused by: javax.naming.NameNotFoundException: seamappEntityManagerFactory not bound They're in the trace of the first(?) error: 2007-07-02 22:40:13,765 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/seamapp].[jsp]] Servlet.service() for servlet jsp threw exception javax.faces.el.EvaluationException: Cannot get value for expression '#{tirolesFinder.example.roId}' Gergo View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4059738#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...