So if you're freezing a track / synth, and you realize there's an envelope that stretches just short of infinity - is there any way to interrupt the freeze process within Sonar (other than using Windows Task Manager to force close Sonar externally?)  Or do you just have to chill for a few days?

Click the x in the transport module display, the red boc in the image below

You should be able to hit the esc key. This works for real time freeze/bounce, I haven't tried it on fast bounce.

EDIT - Steve beat me to it, with an even better idea 😏

Both options work - thanks!!