Thanks to all the posts from everyone. I've used Band in a box since actually the DOS version, and it has been generally great for most of the time. Since the BIAB real tracks have specifically 6/8 styles (even 9/8, 12/8 etc) I presumed that they had updated their code to support this.

What I did at this point was create a midi track in my DAW (in my case Cubase 12) where the tempo there is set to quarter note = 80, and the time signature track is set to 6/8. In this case, expressed in minutes, this song translates to 4:34. Expressed in measures it's 120 measures.

I then input the chord structure in BIAB (which constitutes 120 measures) and for now I turned off the "automatic ending". I selected one of the 6/8 styles (in this case _ROOTLES.sty), set the measures to 2 beats per measure and set the TEMPO to 53 (which is the dotted quarter equivalent of quarter=80). In this case, the song outputs as 4:45 when outputting the real tracks to audio (wav) and of course don't align with the cubase tracks when playing. I also tried shifting the BIAB TEMPO to 55, and in BIAB it indicated 4:34 time, but when I output the WAV files they came in shorter (like 4:20 or so) and of course didn't align with the other tracks.

Since I was interested in obtaining the wav real track output, I did not test pulling out MIDI from BIAB to see if that would match.

In any case, I will continue to test with this and see if I can get any closer to solution, but I think one of the posters was correct that this is an area that probably needs re-working if you really want to take advantage of anything past 2/2, 3/4. 4/4.

Once again, thanks very much for all the quick replies that I've seen here!

Rudy