Invalid transformation chosen error - 4DCT registration

Any insights into why I’m getting this error (please see image below)

Here’s what I’ve tried and how I managed to bypass it. FYI this dataset has some motion artifact, and part of the distal radius is not visible.

  1. I placed all the models (radius, capitate, and lunate) inside the radius, and ran Hierarchical3DRegistration. It only registered the first two frames
  2. I also tried placing all models inside the capitate and the lunate. In all cases, the registration only worked for the first two frames.
  3. I was able to by pass the issue by not nesting any models inside others and instead registering each frame at a time.

Any thoughts or suggestions would be appreciated!