Just a heads up for everyone out there. I needed to make the following changes to guvnor's POM in order to get the webapp to work properly on Tomcat. I would imagine some of these issues would appear on JBoss also but have not tried. 1. Changed seam from 2.1.0.BETA1 to 2.1.0-SNAPSHOT to prevent classloader problem POM Changes <dependency> <groupId>org.jboss.seam</groupId> <artifactId>jboss-seam-remoting</artifactId> <version>2.1.0-SNAPSHOT</version> </dependency> <dependency> <groupId>org.jboss.seam</groupId> <artifactId>jboss-seam</artifactId> <version>2.1.0-SNAPSHOT</version> </dependency> EXCEPTION without change SEVERE: Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener java.lang.IllegalStateException: Cannot load WEB-INF/classes/net/sf/webdav/exceptions/AccessDeniedException.class from WebappClassLoader delegate: false repositories: /WEB-INF/classes/ ----------> Parent Classloader: org.apache.catalina.loader.StandardClassLoader@c4fe76 (using getResourceAsStream() returned null) at org.jboss.seam.deployment.AbstractDeploymentHandler.getClassFile(AbstractDeploymentHandler.java:41) at org.jboss.seam.deployment.ComponentDeploymentHandler.handle(ComponentDeploymentHandler.java:57) at org.jboss.seam.deployment.DeploymentStrategy.handle(DeploymentStrategy.java:177) at org.jboss.seam.deployment.AbstractScanner.handleItem(AbstractScanner.java:30) at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:141) at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137) at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137) at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137) at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137) at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137) at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137) at org.jboss.seam.deployment.URLScanner.scanDirectories(URLScanner.java:40) at org.jboss.seam.deployment.StandardDeploymentStrategy.scan(StandardDeploymentStrategy.java:107) at org.jboss.seam.init.Initialization.create(Initialization.java:113) at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:34) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3843) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4350) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:829) at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:718) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1147) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) at org.apache.catalina.core.StandardHost.start(StandardHost.java:719) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:578) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413) 2. Added javax.persistence to prevent ClassNotFoundException POM Changes <dependency> <groupId>javax.persistence</groupId> <artifactId>persistence-api</artifactId> <version>1.0</version> </dependency> EXCEPTION without change SEVERE: Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener java.lang.RuntimeException: Could not create Component: org.jboss.seam.core.init at org.jboss.seam.init.Initialization.addComponent(Initialization.java:1068) at org.jboss.seam.init.Initialization.init(Initialization.java:614) at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:34) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3843) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4350) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:829) at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:718) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1147) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) at org.apache.catalina.core.StandardHost.start(StandardHost.java:719) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:578) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413) Caused by: java.lang.NoClassDefFoundError: javax/persistence/Entity at org.jboss.seam.Seam.getComponentType(Seam.java:109) at org.jboss.seam.Component.<init>(Component.java:210) at org.jboss.seam.Component.<init>(Component.java:199) at org.jboss.seam.init.Initialization.addComponent(Initialization.java:1052) ... 26 more Caused by: java.lang.ClassNotFoundException: javax.persistence.Entity at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1360) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1206) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) ... 30 more 3. Added hibernate-validator to prevent ClassNotFoundException POM Changes <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>3.0.0.GA</version> </dependency> EXCEPTION without change SEVERE: Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener java.lang.RuntimeException: Could not create Component: org.jboss.seam.international.statusMessages at org.jboss.seam.init.Initialization.addComponent(Initialization.java:1068) at org.jboss.seam.init.Initialization.installComponents(Initialization.java:984) at org.jboss.seam.init.Initialization.init(Initialization.java:646) at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:34) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3843) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4350) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:829) at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:718) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1147) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) at org.apache.catalina.core.StandardHost.start(StandardHost.java:719) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:578) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413) Caused by: java.lang.NoClassDefFoundError: [Lorg/hibernate/validator/InvalidValue; at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2427) at java.lang.Class.privateGetPublicMethods(Class.java:2547) at java.lang.Class.privateGetPublicMethods(Class.java:2563) at java.lang.Class.getMethods(Class.java:1410) at org.jboss.seam.Component.hasAnnotation(Component.java:1078) at org.jboss.seam.Component.<init>(Component.java:212) at org.jboss.seam.Component.<init>(Component.java:199) at org.jboss.seam.init.Initialization.addComponent(Initialization.java:1052) ... 27 more Caused by: java.lang.ClassNotFoundException: org.hibernate.validator.InvalidValue at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1360) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1206) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) ... 36 more 4. Seam's version of the Java Expression Language was clashing with Tomcat's POM Changes - exclude from seam <dependency> <groupId>org.jboss.seam</groupId> <artifactId>jboss-seam</artifactId> <version>2.1.0-SNAPSHOT</version> <exclusions> <exclusion> <groupId>javax.el</groupId> <artifactId>el-api</artifactId> </exclusion> </exclusions> </dependency> - comment out from POM <!--<dependency>--> <!--<groupId>javax.el</groupId>--> <!--<artifactId>el-api</artifactId>--> <!--<version>1.2</version>--> <!--<scope>runtime</scope>--> <!--</dependency>--> Exception without change java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Lj avax/el/ExpressionFactory;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/index_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have differ ent Class objects for the type javax/el/ExpressionFactory used in the signature at org.apache.jsp.index_jsp._jspInit(index_jsp.java:22) at org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52) at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:159) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.seam.web.ContextFilter$1.process(ContextFilter.java:42) at org.jboss.seam.servlet.ContextualHttpServletRequest.run(ContextualHttpServletRequest.java:53) at org.jboss.seam.web.ContextFilter.doFilter(ContextFilter.java:37) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) let me know if we should use different versions then the ones I have listed. thanks dave sinclair