Quote:
I immediately observed that there were MIDI notes thru-out the song. This surprised me as I thought I'd be starting fresh and entering my own notes. It must have picked up the notes from the chords I had entered in a few bars. When I tried to zoom out so I could select and delete these notes, BiaB crashed; some kind of "Exception Error".

If you applied a a MIDI Super Track and generated the song, it would generate the MIDI notes that you probably are seeing/hearing.

However, this doesn't explain the crash.
Exactly how did you zoom out, e.g. with the horizontal zoom out or the vertical zoom out button, or by some other method?
I couldn't repeat the crash here (so far).

BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones