"QPool.Char" wrote : You were totally right.... my build script did not package all of the .class files. I m sorry for stealing your time.... i will look at the easy things first when i face the next problem. :) Could you please tell a bit more about that ? Having the same problem. The exception is javax.persistence.PersistenceException: [PersistenceUnit: telePUnit] class or package not found | | ..... | | Caused by: java.lang.ClassNotFoundException: com.track.AutoCMP | The AutoCMP.class is packaged. Breaking my head during the whole day, please help, what's wrong ? Thank you ! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4055154#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...