Are you manually setting track point or automatically? If you’re trying to do it automatically then Syntheyes is tracking points on your actor as well as the marks on the greenscreen. This will screw up the track.
The actor must be masked out either before bringing the shot in, or within Syntheyes.
You didn’t really give any details as to what’s going wrong, so this was just a guess.
Joey Foreman
Editor/Animator
Nowhere Productions, Athens, GA