Hi Sylvain, It ought to be fairly easy to migrate OmniEvents from omniORB3 to omniORB4, since the event service ought to use plain vanilla CORBA for all but a few configuration details. Where did you find OmniEvents? I have looked around for it to see, if i could quickly migrate it, but the SourceForge project is empty and google came up with nothing.... Yours sincerely, Bjorn