Rmic and "contains an invalid return type."

Question

Hello,
since two days, rmic does not compile anymore. rmic is called via an Ant job like this:
<javac srcdir="${src}" destdir="${bin}" depend="true">
</javac>
<rmic base="${bin}" includes="../**/*.class" iiop="true" idl="true">
</rmic>
And I get errors like
[rmic] error: Class Session contains an invalid return type.
in the Eclipse output console. On the other hand, the Session interface looks like this:
public interface Session extends Remote {
public Enumeration enumerateLocks() throws RemoteException;
[more Methods]
(yes, all methods throw RemoteException)
If I comment out all methods of Session, other messages appear, such as:
[rmic] error: Class ....AccessService contains an invalid argument type in method findSession.
[rmic] error: Class Loader contains an invalid return type.
[rmic] error: Class ....Service contains an invalid argument type in method init.
All classes compile fine with both Jikes and the Eclipse compiler.
Thanks for any help,
Johann

Answer 1

Sorry, even if I comment out Enumeration, rmic will not compile the classes. To me it looks like something in the interface for Session is wrong, but I dont know what it is...
public interface Session extends Remote {
public Unique sessionID() throws RemoteException;
public long sessionCreated() throws RemoteException;
public long sessionDestroyed() throws RemoteException;
public void destroySession() throws RemoteException;
public int actionsPerformed() throws RemoteException;
public Enumeration enumerateActions() throws RemoteException;
public Lock createLock(Reference ref) throws RemoteException, LockedException;
public Lock createLock(Reference ref, long milliseconds)
throws RemoteException, LockedException;
public void releaseAllLocks() throws RemoteException;
public Enumeration enumerateLocks() throws RemoteException;
public boolean isDestroyed() throws RemoteException;
If I comment out all methods in Session, I can compile Session with rmic, but other errors appear:
[rmic] error: Class ...AccessService contains an invalid argument type in method isValidSession.
[rmic] error: Class Loader contains an invalid return type.
[rmic] error: Class ...Service contains an invalid argument type in method init.