Do you have version 2018 build 267? (check Band-in-a-Box menu | About)

Also, are you on an admin or standard account on the Mac? (check System Prefs -> users) Which OS?

You should download and reinstall this to be sure, as it will also fix any permissions problems with the Band-in-a-Box folder there might be.
https://www.pgmusic.com/support_macintoshupdates.htm

I'm not sure what could be causing it, are you sure that you are opening the same file? It seems like the most likely cause is that it's not the same file somehow...

- For example, if you started with MySong.SGU and added a melody, it's going to save it as MySong.MGU. Perhaps you are opening MySong.SGU?

- Or, maybe the same song saved in two different locations and/or you're running Band-in-a-Box from your hard drive vs. internal drive? Next time you save the file, give it a unique name

- If it's not somehow a duplicate file or permissions problem, are you able to link to or email a file with this problem so that we can take a look?


Andrew
PG Music Inc.