Hi All, I am getting the following exception when I try to run the EJBServer script. I am new to this and your help will be appreciated. OS: Linux-Mandrake 7.1 [root@abldev01 classes]# EJBServer JOnAS Server, version 2.0, running on rmi. TransactionService: Cannot rebind TM: javax.naming.CommunicationException [Root exception is java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.io.InvalidClassException: org.objectweb.jonas.jtm.TransactionFactoryImpl_Stub; Local class not compatible: stream classdesc serialVersionUID=-1023774639622504485 local class serialVersionUID=-8193650898591423451] JOnAS: Cannot start Transaction Service javax.naming.CommunicationException. Root exception is java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.io.InvalidClassException: org.objectweb.jonas.jtm.TransactionFactoryImpl_Stub; Local class not compatible: stream classdesc serialVersionUID=-1023774639622504485 local class serialVersionUID=-8193650898591423451 java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.io.InvalidClassException: org.objectweb.jonas.jtm.TransactionFactoryImpl_Stub; Local class not compatible: stream classdesc serialVersionUID=-1023774639622504485 local class serialVersionUID=-8193650898591423451 java.io.InvalidClassException: org.objectweb.jonas.jtm.TransactionFactoryImpl_Stub; Local class not compatible: stream classdesc serialVersionUID=-1023774639622504485 local class serialVersionUID=-8193650898591423451 at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteC all.java:245) at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:220) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:354) at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source) at com.sun.jndi.rmi.registry.RegistryContext.rebind(RegistryContext.java:134) at com.sun.jndi.rmi.registry.RegistryContext.rebind(RegistryContext.java:141) at javax.naming.InitialContext.rebind(InitialContext.java:366) at org.objectweb.jonas.naming.NamingManager.rebind(NamingManager.java:226) at org.objectweb.jonas.jtm.TransactionService.<init>(TransactionService.java:66 ) at org.objectweb.jonas.server.Server.main(Server.java:89) Thanks Srinivas ---- To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "unsubscribe jonas-users". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".