Hi, I am also getting the same exception. In the junit report for all the test cases I am getting the following error. testSayHello_proxy Error Could not dereference object javax.naming.NamingException: Could not dereference object [Root exception is java.lang.ClassNotFoundException: org.apache.xerces.dom.DeferredElementNSImpl] at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1150) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:705) at org.jboss.naming.client.java.javaURLContextFactory$EncContextProxy.invoke(javaURLContextFactory.java:135) at $Proxy1.lookup(Unknown Source) at javax.naming.InitialContext.lookup(InitialContext.java:351) at org.jbpm.bpel.tutorial.hello.HelloTest.setUp(HelloTest.java:48) at junit.extensions.TestDecorator.basicRun(TestDecorator.java:22) at junit.extensions.TestSetup$1.protect(TestSetup.java:19) at junit.extensions.TestSetup.run(TestSetup.java:23)Caused by: java.lang.ClassNotFoundException: org.apache.xerces.dom.DeferredElementNSImpl at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:242) at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:574) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1538) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1628) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1293) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1628) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1293) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339) at java.util.HashMap.readObject(HashMap.java:1013) at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:919) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1813) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1628) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1293) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339) at java.util.HashMap.readObject(HashMap.java:1013) at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:919) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1813) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339) at org.jboss.ws.jaxrpc.ServiceObjectFactory.getObjectInstance(ServiceObjectFactory.java:121) at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304) at org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1125) at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1142) ... 19 more on the server side it displays the following message 17:39:12,932 INFO [ClientDeployer] Client ENC bound under: jbpmbpel-client 17:39:13,510 INFO [ClientDeployer] Removing client ENC from: jbpmbpel-client Thanks in advance for your help. Regards, Prabhakar N. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4046462#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...