My 1st suggestion would be to not run a mini-max. Besides the better tuning options (EFILive for 01-16), the hardware is no longer supported by the tuning community since H&S went bankrupt and can no longer provide updates or repairs. Yes a few places do repair them but the technology is old and (in my opinion) was never good for the Duramax community as we've always had better options available.
Are you trying to load the canned H&S files or custom MCC files?