I've narrowed down the repro scenario by changing the clef a few bars at a time (and saving often in scratch files) until I hit the trouble spot. There was a parenthesized courtesy flat and a slur...

I have a simple finale doc (1 trombone part extracted from a trio, 225 measures) that saves and prints just fine, but when I try to change the clef from tenor to bass, Finale crashes. That is,...