The amazing thing about this place (the Monastery) is that by asking one question, I end up needing to ask many more because I'm always get pushed into new territory. All that to say, I'm not sure I understand Meryln's code as much I as I do yours, runrig. Both you and Zaxo talk about "dispatch tables" which I have read about here at PMs, but can't find in my well-worn Camel book. So, I'm going to Google and try to get my head around this, 'cuz it looks like I'm being pointed in that direction.