Hi Below is the code i use to run the rules in the decision table. I am inserting the empty even object into the session but i still get the "Cannot be resolved issues". I have attached my decison table as well. Am new to DRools, so please help. --------------------------------------------------------------------------------------------------------------------------------------------------------------------- DecisionTableConfiguration dtableconfiguration = KnowledgeBuilderFactory.* newDecisionTableConfiguration*(); dtableconfiguration.setInputType( DecisionTableInputType.*XLS* ); KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.*newKnowledgeBuilder*(); kbuilder.add( ResourceFactory.*newClassPathResource*( "RFC36877ScenarioDT.xls", getClass() ), ResourceType.*DTABLE*, dtableconfiguration ); *if* ( kbuilder.hasErrors() ) { System.*err*.print( kbuilder.getErrors() ); *return* -1; } KnowledgeBase kbase = KnowledgeBaseFactory.*newKnowledgeBase*(); kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() ); // typical decision tables are used *statelessly * StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession(); //now create some test data Input input = *new* Input(); System.*out*.println("creating the event..."); BusinessEvent event = *new* BusinessEvent(); ksession.execute( Arrays.*asList*( *new* Object[]{input, event} ) ); System.*out*.println( "Business events " + event.getEvents()); *return* 0; --------------------------------------------------------------------------------------------------------------------------------------------------------------------- Thanks Manikandan