AUX Buss stops playing

[Intransit]

Here's something cool and new to ProTools.

I have about 58 tracks with their outputs routed to an Aux for processing and controlling the wet dry mix. I press play, nothing comes out of the Aux I just hear the reverb sends. I have make the Aux inactive then reactivate to get the dry signal back.

Super fun with producers and director breathing down my neck for changes.

Anyone else? I have video and about 200 tracks (mostly Instrument) going.

[YYR123]

I would say more info would be helpful. Computer type specs PT version ecetra

It's gotta suck yes but did it just start happening? Or ....

[Intransit]

Mac Pro 2012 12-Core 2.4GHz RAM 48GB
Native 11.1.3 HD / 10.3.8 HD / OSX 10.8.5

It was fine but this session is pretty big. The more I added the more unstable it seemed. Even some weird glitch where the master fader meters would no longer show the bottom full part of the meters just the two little top ones that bounce above. Disabling the video engine seems to make it happen less.