Roadhog bluescreen

Last night grand premiere. In the middle of act 1, bluescreen. Dead hog. Makes a man nervous. How do you get rid of this?
Situation, Roadhog, 2.2.2. Main cuelist, fader set to manual. Fading list with GO, and manipulating a deskchannel in the programmer at the same time. Poof!
This is the 3rd time in two weeks this has occurred.

Any tips to prevent this happening again are welcome.

Regards,

Bhagat
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