[rules-users] Template salience

Hello, Is it possible to specify a template salience such as: function long getNbJours(String pStrDDeb, String pStrDFin) { SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy"); Date dDeb = sdf.parse(pStrDDeb) ; Date dFin = sdf.parse(pStrDFin) ; long diff = dFin.getTime() - dDeb.getTime() ; return (diff / (24 * 60 * 60 * 1000)) ; } template "tarification_produit" rule "Periode(a){row.rowNumber}" salience getNbJours("@{ddeb}", "@{dfin}") when $p : Produit(id == 1, eval( dDeb.before( getDate("@{ddeb}") ) ) ) then $p.setId(2) ; $p.setPrix(@{prix}) ; update( $p ); end end template I encounter a java.lang.NullPointerException. Thank you in advance for your help. Regards, Benoît _________________________________________________________________ Hotmail arrive sur votre téléphone ! Compatible Iphone, Windows Phone, Blackberry, … http://www.messengersurvotremobile.com/?d=Hotmail