I have two jar, eg: ABC.jar dan DEF.jar. In ABC.jar I have a class that one of the attribute is an EJB in DEF.jar. example : in ABC. jar : I have class MyClassInABC, with one of the attribute: @EJB private MyClassInDEF ejb; MyClassInDEF reside in DEF.jar. If I deploy the ABC.jar and DEF.jar at the same time, there will be java.lang.NoClassDefFoundError. But if I deploy DEF.jar, then deploy ABC.jar manually, it works properly. I guess it was failed because JBoss can not find MyClassInDEF bean when trying to inject it. Would it possible to define a dependency in my ABC.jar ? so it will be deployed only AFTER DEF.jar successfully deployed ? Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4114903#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...