Major Issue - Midi via USB is broken for no apparent reason - ProTools 10.3.9 OS X
 

Hello All,

I really hope that some of you kind people can help me with this! I have tried everything i can think of, and google can't help me either.

From day to day, suddenly absolutely nothing happened when i played on both my Keystation49 keyboard or MPD226 - both connected via USB. It had worked fine on my current setup for over a year, and i haven't updated anything or installed any new programs or plugins. As i restarted my computer, i got the following error while booting Pro Tools: "The original MIDI device associated wwith the MIDI controller "MBox3" could not be located. Please choose an existing MIDI device in the MIDI controller section of the peripherals dialog.".
https://i.imgur.com/E6t0kml.png
Two weird things about this is that i don't have an MBox3 plugged in, but rather an MBox3 PRO. I did have the drivers for the Mbox 3 installed at the time, but i have uninstalled it, and that didn't help and the same error appears. The second weird thing is that the error will only show the first time i open Pro Tools after i reboot, and then it will only be around half the times it shows even then.

Other symptoms are that the MIDI input selector (pictured below) will hang the entire program when i press it for 1-2 seconds and then hang again when ever i chose something. Both my devices shows up here, and in the MIDI/Input Devices menu, so Pro Tools does detect them.
https://i.imgur.com/as4zIVz.png

Lastly, when ever i boot protools, the buttons to change octaces on my Keysatations become unresponsive. Not sure how relevant that is though.
https://i.imgur.com/RCcIX56.png

My setup is Mac OS X 10.8.5 with Pro Tools 10.3.9 and with an Mbox 3 Pro.

So far i have tried (in this order);
Trying different USB ports with no USB hub connected
Borrowing other midi devices, none work
Midi Thru is set, all options set to none under peripherals, midi controllers
Trashing Pro Tools Preferences and Database
Uninstalling Mbox 3 drivers (as i don't use it)
Uninstalling and Reinstalling Mbox 3 Pro drivers
Uninstalling and Reinstalling Pro Tools
Fixing Disc permissions with Disc Utilities

Currently I am at a loss, so i really hope out there has the answer.

Regards,
Sebastian

Re: Major Issue - Midi via USB is broken for no apparent reason - ProTools 10.3.9 OS
 

Update - As i have a PT11 license as well, i just tried downloading that, and it has the same issue

Re: Major Issue - Midi via USB is broken for no apparent reason - ProTools 10.3.9 OS
 

I'm not a Mac person, but I noticed you said you uninstalled the MBox3 driver. Did you re-install the MBox3 Pro driver? You need a driver installed for whatever interface you're using. If you have access to another audio interface, you might try installing it and seeing if that works. If it does, then you'll know its likely an issue with the MBox3 Pro.

Major Issue - Midi via USB is broken for no apparent reason - ProTools 10.3.9 OS X
 

It sounds more like the OS is having issues since CoreMIDI handles the MIDI stuff. I'd reformat the boot drive and reinstall Mountain Lion.

Re: Major Issue - Midi via USB is broken for no apparent reason - ProTools 10.3.9 OS
 

I managed to fix my issues. If anyone comes from Google with similar issues, I went into the Audio and MIDI settings in Mac OS X and removed the unused MBox 3 from the MIDI interfaces.

http://m-audio.com/kb/article/1603