Datacolor User to User Support Group.

David - Everything you suggested had already checked out fine - no yellow 
triangles by the USB devices, noises from the Spectro "healthy", and so 
forth. But the suggestion to unplug Spectro, shut down computer, restart 
and re-plug Spectro did the trick. Things are working okay now. Many thanks 
for your suggestions!!

I'm having some unrelated troubles with the printer itself. Its calibration 
seems to drift even over a couple of weeks' time, and I'm sure this has 
nothing to do with PFP or the Spectro. I'm pretty sure I'll have to send 
the printer off to Epson for re-calibration.

Thanks again - Bill Hansen