I made a standard install, only using defaults. I do not use external drives.
I see all the data in subfolders under the "Applications/Band-In-A-Box" folder, so everything looks OK.
When I rebuild the RealTracks I get a message saying:
"332 RealTracks have folders in /Applications/Band-In-A-Box/RealTracks/, but no r*.st2, r*.xt2 files in the BB Soloists folder..."
But I see them in the /Applications/Band-In-A-Box/Soloists, so this is not helping me. And the problem is not the soloists track but the basic accompaniment tracks.