You are ABSOLUTELY RIGHT. I am never creating daughter, I have just a reference. My code should be: | @Entity | @Name("mother") | public class Mother { | | private Daughter daughter = new Daughter(); | | ... setters and getters | } | When poor old Seam tried to set the values for daugher it found no target object. Thank you very very much. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4121541#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...