no replacement. Skeletons are no longer required for remote
method calls in the Java 2 platform v1.2 and greater.
This exception is thrown when a call is received that does not
match the available skeleton. It indicates either that the
remote method names or signatures in this interface have changed or
that the stub class used to make the call and the skeleton
receiving the call were not generated by the same version of
the stub compiler (rmic).