CGAL users discussion list

Hi

I get an assertion when I try to build an arrangement with a lot of lines:

CGAL error: precondition violation!
Expr: Segment_assertions::_assert_is_point_on (p, cv, Has_exact_division()) 
&& compare_xy(cv.left(), p) == SMALLER && compare_xy(cv.right(), p) == LARGER
File: /Users/jegeblad/CGAL_Install/include/CGAL/Arr_segment_traits_2.h
Line: 730
Abort trap


Does anyone know what could cause this problem? Could it be a floating-point 
problem?

Best - Jens