CGAL users discussion list

[Alexander Lühmann <>]

Dear CGAL professionals,

for use at university I have written a program that creates 3d meshes from 
raw lattice files using the cgal library.
Now some errors occur that I do not really understand - maybe you can help me?

What does not seem to work is following: The Program stops during any 
optimization process if I used the refinement function.
A mesh that is generated and afterwards refined, causes a crash/abort during 
lloyd/perturbation optimization (which is explicitly called after the 
meshing/refining process)
. 
Lloyd optimization leads to a simple "Abort" while perturbation with a time 
of 180s and a sliver bound of 30 ended in this error message:

"terminate called after throwing an instance of 'CGAL::Assertion_exception'
  what():  CGAL ERROR: assertion violation!
Expr: !slivers.empty()
File: /opt/local/include/CGAL/Mesh_3/Sliver_perturber.h
Line: 477
Abort"

Can you help with this?
Best regards

Alex