Aww, a pitty you don't remember Rich.
I'm, encountering the very same error with my new (updated from 2009) BiaB 2012 release,
when trying the tutorial excample with Amplitube.
Choosing a different Guitar style doesn't help.
I have installed BiaB on my laptop too, and the same error shows up there as well.
(it's an 2009 Update of Biab there too).
Im running XP SP3 with 3.5 GB of Ram.