I exported 100 flows but only 98 MIDI files were created. The two that were skipped had characters in the flow name that can’t be used in file names - double quotes and question marks. This makes sense, except that I received no warning message; Dorico just silently skipped these flows. Ideally, I would expect Dorico to either warn me, or better yet, leave these characters out of the MIDI file name.
This is a bug that we’ve already fixed for the next update.