Hi, what is the difference between GotTransformNotAvailableMessage() and GotTransform() ? Also how can I ensure that I get only unique frames from a tracker ? Thanks, Somi -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://public.kitware.com/pipermail/igstk-users/attachments/20101108/a8d8d78c/attachment-0001.html>