I've had no problem with TS personally.
Depending on how you created the geometry, it *might* be badly formed. If you can load the mesh, try using the "try to fix bad geometry" button, then resave the mesh as a different file.
Depending on how you created the geometry, it *might* be badly formed. If you can load the mesh, try using the "try to fix bad geometry" button, then resave the mesh as a different file.