What generally causes such an error?
The problem comes trying to do something similar to my last Bongo problem, in this case point-editing a surface.
Okay I found the problem, I had to go to frame 0 and wiggle around some control points to get I guess to register a starting keyframe properly. It would be nice if I didn’t have to do that.
On another issue, it’s also a nuisance that I can’t rotate control points with the Rotate command while making keyframes. I guess I can use the gumball.