Hello We are trying to upgrade from JBoss 4.0.5 GA to 5.0.0 GA. We have 3 EAR's and our problem is now that one EAR needs to find a class in another EAR. But we get the error : java.lang.NoClassDefFoundError We searched a lot and found the option "useJBossWebLoader" in war-deployers-jboss-beans.xml and thought this would solve the problem. But it doesnt. Anyone has a hint how we can find a class from one EAR in another ? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4200892#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...