Justin Bisceglio

Hi! Yes, I'm able to investigate your file now.
I've attached a new version of the failedtopotransfer.hipnc file, called failedtopotransfer_v2.hipnc, with a node setup that shows some the basic and more advanced usage of Topo Transfer.

To get it working, it is necessary that the template geometry is a manifold mesh. I used the Clean SOP with the option "Manifold Only Topology" toggled. This gets the template geometry cleaned up for Topo Transfer. Since the template geometry consists of multiple unconnected meshes, it is necessary to specify to Topo Transfer which mesh should be deformed to the target geometry, and which mesh components should deform but stay relative to the template geometry (like the eyeballs and fingernails). This is done by toggling the "Enable Geometry Constraints" option on the Topo Transfer node. These two step get the Topo Transfer node working without errors. From here it now becomes a matter of directing the result with use of landmarks and optional mask painting which is shown a little in the file.

Since you already have UVs on the template mesh, you will probably get a better result for textures by baking any maps for the target geometry UVs onto the UVs for the template geometry. Currently, this also requires a Labs tool called Labs Maps Baker.

Hope this helps with getting you started.
Thanks

Hi! Can you please include the mesh data that is read by the file1 and file2 nodes, or embed them in the file by locking the file nodes and attaching a new version of the file? Thanks.

Looks like a bug in the UV Layout SOP. Can you submit a bug report?
Also, it looks like there is a warning flag on the UV Layout SOP which might give some clues about the buggy behavior.