Hi Ismail, If you look at the conditions part of your rule, you can remark that the second condition doesn't follow the JBoss Rules DRL valid syntax: (http://labs.jboss.com/file-access/default/members/jbossrules/freezone/doc...): bound_variable: Name-of-Bean-Class( constraints) (from here is the DRL syntax error!) $act :activity(activityName != "activite1",$type:type, $activite : activite) Best regards, Oana fakhfakh ismail <ismail_info2005(a)yahoo.fr&gt; wrote: Hello, when I execute this code rule "sample6" when act :activity(activityName != "activite1",type:type, activite : activite) pp: activite.getactivity() then act.getActivityName(); System.out.println("deux clés ont la meme valeurs " +act.getActivityName()); end an error is affiched Exception in thread "main" org.drools.rule.InvalidRulePackage: Unable to resolve ObjectType 'activite.getActivity' at org.drools.rule.Package.checkValidity(Unknown Source) at org.drools.common.AbstractRuleBase.addPackage(Unknown Source) at org.drools.jsr94.rules.admin.RuleExecutionSetImpl.<init>(Unknown Source) at org.drools.jsr94.rules.admin.LocalRuleExecutionSetProviderImpl.createRuleExecutionSet(Unknown Source) at org.drools.jsr94.rules.admin.LocalRuleExecutionSetProviderImpl.createRuleExecutionSet(Unknown Source) at org.drools.jsr94.rules.admin.LocalRuleExecutionSetProviderImpl.createRuleExecutionSet(Unknown Source) at com.sample.Rule.fireRules(Rule.java:41) at com.sample.Rule.fireRules(Rule.java:70) at com.sample.DroolsTest.main(DroolsTest.java:60) Thank you for your help Best regard Ismail --------------------------------- Découvrez une nouvelle façon d'obtenir des réponses à toutes vos questions ! Profitez des connaissances, des opinions et des expériences des internautes sur Yahoo! Questions/Réponses._______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users --------------------------------- Don't pick lemons. See all the new 2007 cars at Yahoo! Autos.