That made things a bit clearer. I think I'll use the preserveDataModel, but when I try I get a Nullpointerexception and a Jasperexception:
20:17:20,875 ERROR [PhaseListenerManager] Exception in PhaseListener RENDER_RESPONSE(6) beforePhase. java.lang.NullPointerException 20:17:21,046 ERROR [Engine] ApplicationDispatcher[/webmetoder] Servlet.service() for servlet jsp threw exception java.lang.NullPointerException 20:17:21,046 ERROR [Engine] StandardWrapperValve[Faces Servlet]: Servlet.service() for servlet Faces Servlet threw exception javax.faces.FacesException: org.apache.jasper.JasperException What is wrong now?
