When I drag either application into the deploy folder, deployment fails. Here is the initial console output when I try to install brms. 07:31:18,921 INFO [ServerImpl] JBoss (Microcontainer) [5.0.0.GA (build: SVNTag=JBoss_5_0_0_GA date=200812041714)] Started in 23s:344ms 07:33:35,527 INFO [TomcatDeployment] deploy, ctxPath=/drools-jbrms, vfsUrl=drools-jbrms.war 07:33:35,618 ERROR [JBossContextConfig] XML error parsing: context.xml org.jboss.xb.binding.JBossXBRuntimeException: Failed to create a new SAX parser at org.jboss.xb.binding.UnmarshallerFactory $UnmarshallerFactoryImpl.newUnmarshaller(UnmarshallerFactory.java:100) at org.jboss.web.tomcat.service.deployers.JBossContextConfig.processContextConfig (JBossContextConfig.java:552) at org .jboss .web .tomcat .service.deployers.JBossContextConfig.init(JBossContextConfig.java:538) ...... Caused by: org.jboss.xb.binding.JBossXBException: Failed to create a new SAX parser at org .jboss .xb.binding.parser.sax.SaxJBossXBParser.<init>(SaxJBossXBParser.java:97) at org.jboss.xb.binding.UnmarshallerImpl.<init>(UnmarshallerImpl.java: 56) at org.jboss.xb.binding.UnmarshallerFactory $UnmarshallerFactoryImpl.newUnmarshaller(UnmarshallerFactory.java:96) ... 67 more Caused by: java.lang.ClassCastException: org.apache.xerces.parsers.XML11Configuration at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source) at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source) at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.<init>(Unknown Source) .... 07:33:35,642 ERROR [JBossContextConfig] XML error parsing: jboss.web/ localhost/context.xml.default org.jboss.xb.binding.JBossXBRuntimeException: Failed to create a new SAX parser at org.jboss.xb.binding.UnmarshallerFactory $UnmarshallerFactoryImpl.newUnmarshaller(UnmarshallerFactory.java:100) at org.jboss.web.tomcat.service.deployers.JBossContextConfig.processContextConfig (JBossContextConfig.java:552) at org .jboss .web .tomcat .service.deployers.JBossContextConfig.init(JBossContextConfig.java:539) at org .apache .catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:279) at org .apache .catalina .util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) This continues for pages with failure to parse any xml files because of this apparent SAX parser issue. - Mike