Hi John, I've read your post carefully, and thanks a lot for your sincere reply~ For the first cause you listed that may lead to the strange IK result, I've experienced the marker labeling mistake that a marker's name changes suddenly in a few frames during gap-fill in Vicon Nexus. And I think it ma...

Dear all: I met a strange problem when executing IK that I cannot figure out what was going wrong. As you can see in the attached figures, the neighbouring two frames (230 and 231) have nearly the same experiment data (blue markers), but a dramatically difference in the IK results of the two can be ...