I encountered this problem while developing a JBoss Seam based application, and I wonder if anyone monitors this forum can provide some assistance. I have a class mapped to Hibernate via the Hibernate mapping file. It loads okay. However, it seems that using Seam annotation causes the class name been altered from MyClass to MyClass_$$_javassist_1. This in turn causes the Hibernate entity persister not able to find the corresponding mapping of the class because it is using the string returned by "object.getClass().getName()" as the key to lookup the corresponding persister. I wonder if the class name change is automatic or is it something configurable? Is there anyway to work around this sort of problem? Thanks, View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4113564#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...