Yosemite and Issue Importing Session Data

Howdy,



I've been beta testing Yosemite since they released it to the public. All was good until today.



I'm having a slight issue now with importing session data into a new session.



When I tried to open an existing session, Pro Tools would stop responding and I would have to force quit the software.



I decided to create a new session and import the session data. Audio and Aux tracks seem to be OK but Instrument tracks with MIDI tend to be the source of the issue.



Can you let me know if you're experiencing the same issue?



thanks,

Francisco



Pro Tools 11.2.1

Mac Pro (Late 2013)

3 GHz 8-Core

32 GB 1866 MHz DDR3 ECC