Remote Exception occurred in server thread

[RimK]

I'm starting with RMI.
every thing lookks okay, I compile with rmic without probreblems. the Stub and the Skelton appear in classes directory. rmi regystry launched But When I launch the Server this exception occurs :

java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: barep.RMI.CalculImpl_Stub


I think it means that the stub is not generated !
please help me ! is there any configuration with rmi registry I did the same as java tutorial .

thank you in advance.