Mocha workspace blank (no frame/image)

Hi!
I’m having the worst time pulling a good key on 4 videos I’m working with (similar grey background). I thought I’d track my subject using Mocha in Primatte Studio as a workaround, but when I Launch Mocha from the Primatte interface (yes, clip is selected… it was an “event effect” in my NLE VP17) the workspace is black/blank instead of showing my video.

Help?!

Mocha screen…

The frame which I was expecting…

Sometimes Vegas will fail to deliver videos to custom UI elements unless the current time indicator is over the clip in the time before launching the custom UI.

If that doesn’t help, please send a zip of your BCC and mocha log files off-list to me: jclement at borisfx dot com or via private message through the forum. The log files can be found here:
C:\Users\YOUR_USER_NAME\AppData\Roaming\BorisFX\Logs\BCC.log
C:\Users\YOUR_USER_NAME\AppData\Local\Imagineer Systems Ltd\imagineer.log

Cheers,
Jason