In the above example I have changed from an A to Bb clarinet at bar 5 and in the full score this looks correct, however, the parts show the introduction of a new, all be it temporary, key signature (3 sharps at bar 3). This is corrected when the following notes appear at bar 5. I cannot see the logic in this and attempts to hide/remove this extraneous key signature failed. Can you explain what is happening here?
It is bar 4 which I have a problem with. The key signature changes temporarily from 2 flats to 3 sharps in the parts. This corrects in bar 5 to one flat when the instrument change from A to Bb occurs.
