Teterahedral elements generation

[neco]

I am trying to reconstruct the 3D Mesh from the 3D grain reconstruction. So far, the mesh surfacegeneration seems to be ok, as no closeness, nor intersections, nor bad orientations appear in teh model. The problem is that it does not do anything. From tetragen, I click Run now, it takes its time to do it and nothing else. Not even error messages. I also save the grid data but it does not save it.
If I export the .wrl the file is extrangely small and another software able to read .wrl does not do it (so I am guessing is empty).

So is there anything wrong with the operation？

[ShawnZhang]

How big is the surface? Is it possible to post it?