CGAL users discussion list

Hello,

I sometimes have problems inserting into a 2D Delaunay triangulation. The 
message says:

CGAL error: precondition violation!
Expr: !is_infinite(f) && !is_infinite(f->neighbor(i))
File: triangulation_2.h
Line: 860

The problem occures only with specific input. The strange thing is that if I 
have a point cloud, which is OK to insert and shift it, then it's suddenly 
not OK any more, but the triangulation should be the same in both cases!

Many thanks for any ideas!

Angelina