Mackie support said if the firmware does not match the master fader app version the unit will not function. She could not explain why it worked Thursday night but not Friday. The was no update issued between Thursday and Friday. Of course, she said this had never occurred before. That is something I have heard from various tech supports on numerous occasions so pardon many skepticism.
The only thing she could offer was a force update procedure if it happened again. Turn off the mixer and undock the ipad. There is a recessed button next the the power cable. Hold it in and turn on the mixer. Release the recessed button after about 3 seconds and dock the ipad. This will cause the mixer to update the firmware from the master fader app on the ipad and allow them to work together. Any ipad on a different version will not work. It takes about 15 minutes.
The only thing she could offer was a force update procedure if it happened again. Turn off the mixer and undock the ipad. There is a recessed button next the the power cable. Hold it in and turn on the mixer. Release the recessed button after about 3 seconds and dock the ipad. This will cause the mixer to update the firmware from the master fader app on the ipad and allow them to work together. Any ipad on a different version will not work. It takes about 15 minutes.