CADMesh TetGen Degenerate tetrahedra

I am successful using CADMesh with the TessellatedMesh. Now I am trying to use the ```
TetrahedralMesh approach. I am trying to simulate a cube to keep it simple.
At runtime I get a bunch of warnings:

Warning: Point #1 is coincident with #23. Ignored!
Warning: Point #30 is coincident with #23. Ignored!
Warning: Point #14 is coincident with #28. Ignored!
etc.

The a G4 error

-------- EEEE ------- G4Exception-START -------- EEEE -------
*** G4Exception : GeomSolids0002
issued by : G4Tet::G4Tet()
Degenerate tetrahedron not allowed.
*** Fatal Exception *** core dump ***
**** Track information is not available at this moment
**** Step information is not available at this moment

-------- EEEE -------- G4Exception-END --------- EEEE -------

Any suggestions would be appreciated!
Brian