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[Ranjana Shevkar <>]

hello,

I am using CGAL4.2_beta1 on Win XP. I am trying to calculate points on
convex hull using bykat, akl_toussaint and jarvis algorithms. for
bykat while executing for Random circular distribution 8192 points,
following run time error is there


CGAL error: postcondition violation!
Expression : is_ccw_strongly_convex_2(
res.output_so_far_begin(),res.output_so_far_end(),ch_traits)
File       : C:\Program
Files\CGAL-4.2-beta1\include\CGAL/Convex_hull_2/ch_bykat_impl.h
Line       : 109
Explanation:
Refer to the bug-reporting instructions at http://www.cgal.org/bug_report.html

for jarvis , same error is given for all points.

for akl_toussaint there is an error : compatibility between input and
output iterator to forwarditerator.

please help me