CGAL users discussion list

[Bernd Gaertner <>]

Genís wrote:
> CGAL error:
> precondition violation!
> Expr: comp_f(object, nodeP->object) != LARGER
> File: /usr/include/CGAL/Multiset.h
> Line: 214

The cause is most likely this line:

>     typedef CGAL::Cartesian<double>    Kernel;

This is an inexact kernel that comes with no guarantee and whose usage 
may lead to the indicated failures. CGAL has other kernels that do come 
with guarantees, please see the FAQ item at 
http://www.cgal.org/FAQ.html#inexact_NT, and the philosophy page at 
http://www.cgal.org/philosophy.html.

Best,
Bernd.