Substyles to me are the differences in sound that are marked by blue or green indicators. Green is generally ‘busier’ sounding than blue. If that’s what you mean, then yes, they work fine.
If they don’t work for you, then try Return to Factory Settings.
If that doesn’t work, then we need to know what style or specific RealTracks you are using.
THANKS for replies guys. but I'm not sure were on the same page.
1 RIGHT CLICK ON part marker
2 Pick ANY STYLE from biab,
3 Save as substyle. eg: e/f
4. Select substyle of choice at measure.
5 Biab doesn't acknowledge selection.
Doesn't work for me , 2018