[rules-users] encounter NullPointerException when adding ruleflow

Hi all, I tried to run Drools in a webapp, it runs smoothly when I only load simple rules. The spec I have: AP server --> WASCE2.1 (or geronimo 2.1) Spring --> 3.0.5 Drools --> 5.2 Fianl JVM --> IBM SDK 1.6 When I tried to use ruleflow --> execute drl in rf, I got NullPointerException with the following trace: exception org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:656) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549) javax.servlet.http.HttpServlet.service(HttpServlet.java:693) javax.servlet.http.HttpServlet.service(HttpServlet.java:806) root cause java.lang.NullPointerException org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:516) org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:556) org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) net.viralpatel.drools.core.DroolsCore.createKnowledgeBase(DroolsCore.java:17) net.viralpatel.contact.controller.ContactController.listContacts(ContactController.java:41) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:59) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:39) java.lang.reflect.Method.invoke(Method.java:612) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549) javax.servlet.http.HttpServlet.service(HttpServlet.java:693) javax.servlet.http.HttpServlet.service(HttpServlet.java:806) net.viralpatel.drools.core.DroolsCore.createKnowledgeBase(DroolsCore.java:17) is the following line: builder.add(ResourceFactory.newClassPathResource("basicFlow.rf"), ResourceType.DRF); Any advise is appreciated. This is a UTF-8 formatted mail ----------------------------------------------- James C.-C.Yu