Hasta La Motion!

I’m totally stumped.

The code directly below works as expected. It sets the value of operation (blend mode) to screen and the result in the script editor is True. Great stuff.

newMerge1. knob("operation").setValue(10)

The code below here should change the Achannels to rgb shouldn’t it? All I get in the script editor is False..
newMerge1. knob("Achannels").setValue(2)

Please if someone could explain why "Achannels" doesn’t get changed the same way "operation" or "fringe" or any other knob in the Merge2 node?

Is setValue the wrong command for "Achannels" ?

How are we support to change the "Achannels" knob if not by the setValue command?

nuke 5.0v1

Thanks