Govardhan Reddy [http://community.jboss.org/people/sgreddy.vardhan] created the discussion "Please help me to solve the problem" To view the discussion, visit: http://community.jboss.org/message/543663#543663 -------------------------------------------------------------- !) *package* ** *com.ejb3.account;*** ** *import* ** *javax.ejb.Stateless;*** ** *@Stateless* *(name="AccountBean",mappedName="AccountBean")*** *public* ** *class AccountBean implements AccountRemote{*** *public* ** *void deposit(int accno,double amt)*** *{* *System.* +*out.println("Ok Deposited");*** *}* *public* ** *double getBal(int accno)*** *{* ** *return 9999;*** *}* *}* *2)* *package* com.ejb3.account; *import* javax.ejb.Remote; *@Remote* *public* *interface* AccountRemote { *public double getBal(int* *accno);* *public void deposit(int accno,double* *amt);* *}* ** *3)package com.ejb3.account;* *import java.util.Properties;* *import javax.naming.Context; import javax.naming.InitialContext;* *public class AccountEjb3Jboss422Client {* */**   * @param args   */ public static void main(String[] args) {   try{    Properties p=new Properties();    p.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");    p.setProperty("java.naming.provider.url","localhost:1099");    p.setProperty("java.naming.factory.url.pkgs","org.jboss.naming");       Context ctx=new InitialContext(p);          System.out.println("Initial Context created");* *   Object o=ctx.lookup("AccountBean/remote");    System.out.println("lookup successful");    AccountRemote ar=(AccountRemote)o;    System.out.println("Calling EJB method . . .");    ar.deposit(88,10000);    double bal=ar.getBal(88);    System.out.println("Bal is: "+bal);    System.out.println("Output will be in Managed server console");      }catch (Exception e) {    e.printStackTrace();   } } } * *error* *Initial Context created javax.naming.CommunicationException NamingContext.java:722)at org.jnp.interfaces.NamingContext.lookup( NamingContext.java:587)at javax.naming.InitialContext.lookup(Unknown Source) at com.ejb3.account.AccountEjb3Jboss422Client.main( AccountEjb3Jboss422Client.java:24)Caused by: java.io.InvalidClassException: org.jboss.remoting.InvokerLocator; local class incompatible: stream classdesc serialVersionUID = -4977622166779282521, local class serialVersionUID = -2909329895029296248at java.io.ObjectStreamClass.initNonProxy(Unknown Source) at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source) at java.io.ObjectInputStream.readClassDesc(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.defaultReadFields(Unknown Source) at java.io.ObjectInputStream.readSerialData(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.defaultReadFields(Unknown Source) at java.io.ObjectInputStream.readSerialData(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.readObject(Unknown Source) at java.rmi.MarshalledObject.get(Unknown Source) at org.jnp.interfaces.MarshalledValuePair.get( MarshalledValuePair.java:72)at org.jnp.interfaces.NamingContext.lookup( NamingContext.java:652)... 3 more please help me [Root exception is java.io.InvalidClassException: org.jboss.remoting.InvokerLocator; local class incompatible: stream classdesc serialVersionUID = -4977622166779282521, local class serialVersionUID = -2909329895029296248]at org.jnp.interfaces.NamingContext.lookup( * + -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/543663#543663] Start a new discussion in EJB 3.0 at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]