The "sniffer" idea was the first one that crossed my mind.  Especially with the PLCs...

I think you're on the right track.  Carry on.  ;-)  (Of course, the listener.log can be
helpful too, if you turn on debugging.  Gotta be notes on that on Metalink...)


--
Cheers,
-- Mark Brinsmead
   Staff DBA,
   The Pythian Group
   http://www.pythian.com/blogs