Hasta La Motion!

since nuke has problems baking some expressions using edit->generate i just wanted to write my own baking script.
but i seem to run into the same problems as nuke itself: if i query the values from the knob that holds the expression i mostly get 0.0 or another static value over all the frames.

no matter if i use node[knob].value() and set the current frame myself or if i use anim.evaluate(frame).

strangely sometimes it works. but i dont know when and how. very unpredictabel behaviour.

anyone knows how to FORCE nuke to calculate a value?

cheers

alex