Mac Book Pro 2019
Sonoma 14.7.8
BiaB 2025 (902)

Hi
Mi BiaB has total access to the disk and all the permissions.
Nevertheless I have an issue with midi sounds since the moment I used the Medley option, thus:
Track settings and actions dialog / Medley / Change to a new Real Tracks every / 8 bars, and I selected to change between a soloist sax (475) and a soloist trumpet (462). Then I clicked the “OK” button / Play.
Everything sounded fine, but since this action, the GM sounds are behaving crazy: when I play back a MGU file with midi sounds, the piano plays the percussion part, and the other instruments are either silent or holding all the time a single note.
If I save this same MGU file as a MIDI file, and play it back with a midi player, it sounds fine, but not when played back from BiaB: even the audible lead-in instrument is a piano, instead of the expected default side stick.
I would appreciate any help to solve this issue.
Luis