Okay, I'm totally lost here: Whenever the following code is executed I get this error: org.hibernate.hql.ast.tree.FromClause.findIntendedAliasedFromElementBasedOnCrazyJPARequirements(FromClause.java:120) What the heck does this mean? My HQL is perfectly valid! public void endSession() | { | /* | * first get all writing sessions with a null end date. | */ | String userid = context.getCallerPrincipal().getName(); | | List result = em.createQuery( "select w from WritingSession w where w.whatProject.projectOwner=:whatName and w.whatProject.defaultProject=true and w.sessionEnd=null order by id desc") | .setParameter("whatName", userid).getResultList(); | | if(result!=null || result.size()!=0) | { | WritingSession theOpenSession = (WritingSession)result.get(result.size()-1); | theOpenSession.setSessionEnd(new Date()); | em.merge(theOpenSession); | } | | //otherwise there are no sessions to close. | } | JLS View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3976696#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...