I receive an error when I use this querry in a Statefull Entity (selectApplication): return em.createQuery("select a from Application a " + "where lower(a.name) like :name " + "and lower(a.description) LIKE :description " + "and a.category = :category order by a.name") .setParameter("name", name) .setParameter("description", description) .setParameter("category", category); I have 2 entities: Application and Category. This example comes from DVDStore and the name, description and Category comes from a JSF page: <h:selectOneMenu value="#{selectApplication.category}"> <s:convertEntity /> <ui:remove> <f:selectItem itemLabel="Any" itemValue="#{anyCategory}" /></ui:remove> <s:selectItems value="#{allCategories.resultList}" var="category" label="#{category.name}" noSelectionLabel="ANY" /> </h:selectOneMenu> I receive this error: javax.servlet.ServletException: Error calling action method of component with id _id39:_id54 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:152) ... Caused by: javax.faces.el.EvaluationException: /selectApplication.xhtml @48,51 action="#{selectApplication.doSearch}": javax.ejb.EJBTransactionRolledbackException: java.lang.IllegalStateException: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.mycompany.seam.refdata.model.Category at com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:73) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4067364#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...