I'm folowing the maya fundamentals DVD, but I get an strange error when I try addin weight to tangents in the graph editor.
Notice that this usually works well. The problem is when I try editing the curves made by the manual stretch attribute.
(Project1 - 03 Animating the scene - video 25)
// Error: All of the animation curves are non-weighted. Unable to change the weight locked state.
The curve gets this strange hump that kind of destroys the animation. See attached image.