Exporting a 59 Bar cue with 6 MIDI tracks takes 2 hours in 6.0.3. The “ABORT” button does not respond either.
That is rather odd isn’t it?
I’ve had trouble with MIDI exports simiarly. I think it has something to do with enabling certain options in the MIDI export window. If I recall, some of the automation or track FX tickboxes can increase export time exponentially. This has been a long-standing issue since C5 at least.