After adding an instrument to score, Export does not recognize it's there and will not export it.
1) Create a score with multiple instruments.
2) Export all the parts to mscx.
3) Add a new instrument and give it some notes.
4) export again with this time new instrument.
Psych! The new instrument is not in the list to export. It's not even greyed out. It's like it doesn't exist.
I've attached the file that won't export the horn part. Maybe when you see it fresh that it will export. But I can't export it from my current set up.
I don't know how to rate it. It is really inconvenient having to cut and paste to a new horn part that's not connected to the rest of the file.