Adding a new instrument above a staff with notes causes crash
Start new score - 4/4, Eb, 48 bars.
Add title, instruments: Mezzo voice and Piano
Write 8 bars simple melody in voice - no ties
Write simple accompaniment in LH piano, no ties
Wish to copy voive to flute part.
Add Instruments - addf flute
Move it up above the piano.
End "add Instruments"
Crash. "ask run time to terminate it in an unusual way"