I have a "sforzando" trace.
When I try to generate it BIAB 2017 change the situation and magically becomes "Silence".

I do force an un-frozen realtrack to midi. Erased the realtrack and the track ID still shows a green name, even when you try to select a Midi patch. Choosing "No Realtrack" under track options does nothing. Can't get rid of the green track name "Silence". A bug?

What style is this based on?

Workaround: I used the Soloist track for the Acoustic Bass instrument.