Thanks for all the quick replies. That's why I like this place.
Peter,
I simply did the following.
First I am using BiaB 10.5 on a Windows 7 Pro 64 bit system (haven't raised the funds for 2011.
1. made a song with 3 choruses with an intro and a tag of 4 bars and a fade
2. killed the melody in the 2nd chorus
3. clicked on the soloist button and chose the 1372 Trombone, Bossa EV 140
4. generated the part
5. saved the song (at which point BiaB told me it was locking the soloist to the audio when I saved it and if I wanted to change it then I would have to re-generate the part.
Then when I play the piece it does as I expected with a midi melody on tenor sax for the first and third choruses and the trombone RT in the middle chorus. Only when the song goes to the tag, the trombone plays a couple of long notes over 2 measures. The piece fades but I do get a tail effect of louder string sounds after the fade ends. That is a different problem
Maybe this information is helpful.
Rich