[Bongle]

They're all probably related to the same error. You'd have to post the exact code you're using to call the ThresholdRGB function for me to have a clue.

Edit: the code I posted above that has the ThresholdRGB call has a problem. It should be
ThresholdRGB(192,256,192,256,192,256)

I put a 156 where 256 should have been.