I am deploying a EJB/Web Service application on JBoss 4.0.4GA, using JVM 1.5.0_04, after the deploy finished, the system throws this exception: java.lang.NoClassDefFoundError: com/inprise/vbroker/CORBA/Object I attached the more detailed stack trace at end of this message. I looked for some solutions: (1) Some one suggested using JVM1.4, that's not an option for me because I am deploying an exsiting huge project, and the code source is conform with jdk1.5 (2) Weird thing is the app deploys and runs no problem on OC4J10.1.2 Any idea? Thanks! Error Stack trace: java.lang.NoClassDefFoundError: com/inprise/vbroker/CORBA/Object at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1812) at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:866) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1319) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1198) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2328) at java.lang.Class.getConstructor0(Class.java:2640) at java.lang.Class.newInstance0(Class.java:321) at java.lang.Class.newInstance(Class.java:303) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1055) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:932) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3917) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4201) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524) 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:585) at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503) at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.apache.catalina.core.StandardContext.init(StandardContext.java:5116) 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:585) at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503) at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.web.tomcat.tc5.TomcatDeployer.performDeployInternal(TomcatDeployer.java:297) at org.jboss.web.tomcat.tc5.TomcatDeployer.performDeploy(TomcatDeployer.java:103) at org.jboss.web.AbstractWebDeployer.start(AbstractWebDeployer.java:371) at org.jboss.web.WebModule.startModule(WebModule.java:83) at org.jboss.web.WebModule.startService(WebModule.java:61) at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3973413#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...