Before someone else points it out, I've just realised that seq.out() is part of the Corba 2.3 specification rather than "something specific to Visigenic"! OmniORB will allow it from version 2.8 as I also discovered from ftp://ftp.uk.research.att.com/pub/omniORB/ReleaseNote_omniORB_280.txt I'll shut up for today now! Ben Keeping