public class UnknownObjectException
extends ActivationException

An UnknownObjectException is thrown by methods of classes and interfaces in the java.rmi.activation package when the ActivationID parameter to the method is determined to be invalid. An ActivationID is invalid if it is not currently known by the ActivationSystem. An ActivationID is obtained by the ActivationSystem.registerObject method. An ActivationID is also obtained during the Activatable.register call.