"KoniKoni" wrote : I don's now what i do wrong: | | | | <a4j:region> | | <s:div id="frm"> | | <a4j:form> | | | | <h:selectOneMenu value="#{hersteller}" required="true"> | | <s:convertEntity /> | | <s:selectItems value="#{hrList}" var="her" label="#{her.bezeichnung}" noSelectionLabel="Bitte waehlen..."/> | | <a4j:support event="onchange" action="#{fahrzeugact.setModel}"/> | | </h:selectOneMenu> | | | | | | </a4j:form> | | </s:div> | | </a4j:region> | | | | | I get i error "Invalid Value". For one it looks like you want <h:selectOneMenu value="#{selectedHer}" required="true"> Take a look at the ui example application to see this stuff working in action. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4031306#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...