Forearm not rotating in live characters

[llqqff]

Hi, I am doing some research on live characters. Now I have a problem on the forearm not rotating. I use the motion capture(blade) to get the real time data and stream the data into motionbuilder. The skeleton from motion capture is good and moving with subject, and other bones is right. Only the forearm is not
rotating with the real-time human motion.
Does anyone know what's the problem and how to fix it? Thanks.

Qiufeng

[Jeff]

If the forearm of the actor in Motionbuilder is not moving properly you might need to do another t-pose and better adjust the actor to that data.

Or is it the case that the actor's arm moves correctly and that when you re-target this data to a Vizard character that the character's arm does not follow properly?