Character rig (2)

[madwafa]

Hi all,
I'm using XSI 2.02 character rig. I would llike to constraint an up vector to the elbow. But the rig does'nt allow me to.
How do I go about doing this.
Thanks in advance

wafa

[atyss]

Select the upper arm bone
Animate > Skeleton > Chain Up Vector
Pick the upvector object

What is happening?

Salutations - Cheers
Bernard Lebel