Hi all, I have an entity NaturalPerson extends Person with singe table inheritance. @Inheritance(strategy = InheritanceType.SINGLE_TABLE) There is a defined column @DiscriminatorColumn(name = "INHERITANCETYPE", discriminatorType = DiscriminatorType.STRING) which is edited with the correct value. After an upgrade of BEA JRockit R26 to R27 a type cast | NaturalPerson n = (NaturalPerson)aPersonOfWhichIamSureItIsANaturalOne; | fails with a CCE (anything with jassist $-s and proxy). I fixed any typecast for me by using a visitor, but I think this should be fixed. I use JBoss-4.0.5.GA with build in EJB3. Thanks and best regards, Carsten View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4011857#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...