Hi, I'm developing a medium sized project with EJB3 and JBoss (now I'm using 4.0.5). The problem I have is that when I change something on the entity or session bean classes, I can't deploy the jar simply copying the file in the deploy directory; if i do and start a test client, I get ClassCast or IllegalArgument exceptions. A server restart fixs the problem. On my development platform (Netbeans 5.5 and Jboss 4.0.4) this does not happen. What can I check ? Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3981302#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...