Trying to figure out the new rule system... but it doesnt work... This is my rule: package com.prtc.struts.rules import com.prtc.db.MegaTransferObject import java.util.ArrayList import com.prtc.struts.Constants rule "cancel_menu" when megaTO : MegaexistMegaTransferObject() megaTO(other_EffectiveOrderTypeDsl != null) and megaTO(other_EffectiveOrderTypeDsl == Constants.NEW_OPEN_ORDER_TYPE) and megaTO(orders_FkOrderStatusId != null) and megaTO(orders_FkOrderStatusId == Constants.PENDING_TO_BE_SUBMITTED_ORDER_STATUS) then System.out.println("Hello"); end part of my code: InputStreamReader ir = new InputStreamReader(RuleBuilderMgr.class.getClassLoader().getResourceAsStream(ruleDrl)); //the null pointer is from this line. builder.addPackageFromDrl(ir); this is the result: 7661 [main] DEBUG org.apache.commons.jci.compilers.JaninoJavaCompiler - compiling com.prtc.struts.rules.Rule_cancel_menu_0 7942 [main] DEBUG org.apache.commons.jci.compilers.JaninoJavaCompiler - compile com.prtc.struts.rules.Rule_cancel_menu_0 8062 [main] DEBUG org.apache.commons.jci.compilers.JaninoJavaCompiler - compiled com.prtc.struts.rules.Rule_cancel_menu_0 8062 [main] DEBUG org.apache.commons.jci.compilers.JaninoJavaCompiler - compiling com.prtc.struts.rules.Rule_cancel_menu_0ConsequenceInvoker 8072 [main] DEBUG org.apache.commons.jci.compilers.JaninoJavaCompiler - compile com.prtc.struts.rules.Rule_cancel_menu_0ConsequenceInvoker 8092 [main] DEBUG org.apache.commons.jci.compilers.JaninoJavaCompiler - compiled com.prtc.struts.rules.Rule_cancel_menu_0ConsequenceInvoker 8102 [main] FATAL com.prtc.struts.util.ConstructServiceAssuranceTreeMenu - Exception in ShowIspServiceAssuranceAction.execute --> java.lang.NullPointerException 8102 [main] FATAL com.prtc.struts.util.ConstructServiceAssuranceTreeMenu - java.lang.NullPointerException at com.prtc.struts.util.ConstructServiceAssuranceTreeMenu.construct(ConstructServiceAssuranceTreeMenu.java:74) at com.prtc.lc.rules.managers.RuleTester.test1(RuleTester.java:299) at com.prtc.lc.rules.managers.RuleTester.main(RuleTester.java:54) Joel G. Rivera-Gonzalez PRT "The first 90% of a project takes 90% of the time, the last 10% takes the other 90% of the time" - Murphy's Law