Hello Can anyone help me with a problem in deploying an application on JBoss 2.1. My application deploys fine on 2.0 but when I try to deploy it on 2.1 I get the error: javax.naming.CommunicationException. Root exception is java.io.InvalidClassException: org.jboss.ejb.plugins.jrmp.interfaces.GenericProxy; Local class not compatible: stream classdesc serialVersionUID=-6230758090378349913 local class serialVersionUID=7822409041172562877 at java.io.ObjectStreamClass.validateLocalClass(ObjectStreamClass.java:523) at java.io.ObjectStreamClass.setClass(ObjectStreamClass.java:567) at java.io.ObjectInputStream.inputClassDescriptor(ObjectInputStream.java:936) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:366) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at java.io.ObjectInputStream.inputClassDescriptor(ObjectInputStream.java:940) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:366) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at java.io.ObjectInputStream.inputClassDescriptor(ObjectInputStream.java:940) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:366) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1186) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386) at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2262) at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:519) at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1411) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236) at java.rmi.MarshalledObject.get(MarshalledObject.java:138) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:299) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:279) at javax.naming.InitialContext.lookup(InitialContext.java:350) at Test.main(Test.java:103) Dr M.W. Shotton MICROMASS UK LIMITED Floats Road Wythenshawe Manchester M23 9LZ UK +44 (0) 161 718 4548 _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user