Yes, apparently there is an old jar in your classpath. The method that cannot be found, has been added in 2.0.GA. So, apparently you have 2.0.GA code calling 2.0.GA code but, for classpath reasons, it finds 1.5.6.GA code instead, and this code lacks the new method. Try to check if you have any references left pointing to the old version of JBoss AOP. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4190867#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...