If you go to Help | About, and look at the very bottom of this dialog, it will tell you where Band-in-a-Box is running, e.g.:
C:\bb\BBW64.exe

The .st2 files like RElGt187.st2 that it is complaining about need to be present in the Soloists folder in that bb directory, e.g.: C:\bb\Soloists. When you install RealTracks, the audio files go in the RealTracks folder (which may be a custom location like), and the .st2 files go in the Soloists subfolder in your main Band-in-a-Box folder.

Try doing a search for one of the missing st2 files on your computer and see where it's found.


Andrew
PG Music Inc.