So...realstyles are a regrouping of realtracks and only realtracks. Trying a few I came up with a couple of error messages saying it could not find a .st2 matching. suggested reinstalling realtracks.

Got this message log:

This will check RealTracks installation. For a realtracks to work, there needs to be a ST2 file in BB folder, and a folder of WMA files in the RealTracks folder set in Prefs-RealTracks Settings.

RealTracks Configuration ERROR: RealTracks # 3041. RealTracks found here C:\bb\Soloists\RAcG176.ST2, but RealTracks folder not found here: C:\bb\RealTracks\Guitar, Acoustic, Rhythm Klezmer44Quinn Ev 130\. Use Prefs-RealTracks Settings to set correct RealTracks folder.

RealTracks Configuration ERROR: RealTracks # 3042. RealTracks found here C:\bb\Soloists\RBass225.ST2, but RealTracks folder not found here: C:\bb\RealTracks\Bass, Acoustic, KlezmerHora34Neil Ev 120\. Use Prefs-RealTracks Settings to set correct RealTracks folder.
Number of RealTracks ST2 found in BB folder = 2447
Number of RealTracks WMA folder found in RealTracks folder = 2445
This will check dates of Bt0/bt1 files compared to WAV and WMA files in RealTracks and RealDrums.
Drums WMA - no date errors
Drums WAV - no date errors
RealTracks WMA - no date errors
RealTracks WAV - no date errors