My UnitY suddenly stopped working after recalling a scene. No error messages, everything looked ok. Just that I couldn't get anything in or out of it.
Please note that you must restore a scene after assigning the UnitY card. All settings of MIDI page 5; Remote assigns (and by that also UnitY presets and fader settings) are stored within each scene memory.
This means that you must re-assign the UnitY card if you recall another scene where the UnitY card hasn't been assigned before.
Please recall one of the scenes where the card doesn't work and go to MIDI page 5 and select the REMOTE# (where # is the same as the UnitY card slot#): You will see that the display shows "No Assign" meaning that the UnitY card has not been assigned in the actual scene.