Joel, In 3.0.x, you can not use inside a predicate, any other variable bound in the same pattern, besides the one that is bound to the predicate. To do that, you need to use an eval: rule "modem_warranty_menu" when megaTO:MegaTransferObject(other_EffectiveOrderTypeDsl == Constants.NEW_COMPLETED_ORDER_TYPE, at:other_IsAdaAltaTraslado, nm:orders_NewModem ) eval( nm.equals(Constants.FLAG_YES) || (nm.equals(Constants.FLAG_NO) && at.equals(Constants.FLAG_YES)) ) then menu.add(new String[]{Constants.SERVICE_ASSURANCE_TREE_MENU_DSL, Constants.SERVICE_ASSURANCE_MENU_WARRANTY}); end Seems you are doing great in pushing the limitations of drools 3.0. :) This is also a limitation that is already solved in trunk for the next release. []s Edson Joel G. Rivera-González wrote: -- Edson Tirelli Software Engineer - JBoss Rules Core Developer Office: +55 11 3124-6000 Mobile: +55 11 9218-4151 JBoss, a division of Red Hat @ www.jboss.com