one step closer :D i got the problem - at least i think i'm close to! on roleList.xhtml i got: | <s:decorate id="functionField" template="layout/edit.xhtml"> | <ui:define name="label">Function</ui:define> <h:selectManyCheckbox id="functions" value="#{roleHome.instance.functions}" layout="pageDirection"> | <s:selectItems value="#{functionList.resultList}" var="function" label="#{function.name}" /> | <s:convertEntity /> | </h:selectManyCheckbox> | </s:decorate> and when i save i receive the following error: 23:33:05,776 SEVERE [application] java.lang.ClassCastException: ch.emtm.entity.Function cannot be cast to ch.emtm.entity.RoleFunction i understood the problem, but for the moment i have no idea how to solve. i think your code posted above with the new rolefunction() will solve - but i couldn't get. Do you have a hint for me ;) Thanks in advance View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4263326#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...