Hi waynebylor, thank you for your answer - sorry, i forget to attach the code. Here it is: package com.auctonova.ejb.persistence; | | import java.io.Serializable; | | import javax.persistence.Entity; | import javax.persistence.Column; | import javax.persistence.Id; | import javax.persistence.Table; | | | @Entity | @Table(name="PersonHasCustomization") | public class PersonHasCustomization implements Serializable { | private static final long serialVersionUID = 1L; | private String locale; | private long partyidperson; | | //-------------------------------------------------------------------------- | public String getLocale() { | return this.locale; | } | | //-------------------------------------------------------------------------- | public void setLocale(String locale) { | this.locale = locale; | } | | //-------------------------------------------------------------------------- | @Id | public long getPartyidperson() { | return this.partyidperson; | } | | //-------------------------------------------------------------------------- | public void setPartyidperson(long partyidperson) { | this.partyidperson = partyidperson; | } | } | I have still not found the solution. Thank you for your help. Thomas View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4082398#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...