diff --git a/Arrangement_on_surface_2/examples/Arrangement_on_surface_2/polylines-wip-tests/polylines-WIP.cpp b/Arrangement_on_surface_2/examples/Arrangement_on_surface_2/polylines-wip-tests/polylines-WIP.cpp
index a2b391698b1..3bd00038d7d 100644
--- a/Arrangement_on_surface_2/examples/Arrangement_on_surface_2/polylines-wip-tests/polylines-WIP.cpp
+++ b/Arrangement_on_surface_2/examples/Arrangement_on_surface_2/polylines-wip-tests/polylines-WIP.cpp
@@ -5,6 +5,7 @@
 #include <CGAL/Quotient.h>
 #include <CGAL/MP_Float.h>
 #include <CGAL/Arr_segment_traits_2.h>
+#include <CGAL/Arr_tracing_traits_2.h>
 #include <CGAL/Arr_polyline_traits_2.h>
 #include <CGAL/Arrangement_2.h>
 #include <vector>
@@ -15,7 +16,9 @@
 typedef CGAL::Quotient<CGAL::MP_Float>                  Number_type;
 typedef CGAL::Cartesian<Number_type>                    Kernel;
 typedef CGAL::Arr_segment_traits_2<Kernel>              Segment_traits_2;
-typedef CGAL::Arr_polyline_traits_2<Segment_traits_2>   Traits_2;
+typedef CGAL::Arr_polyline_traits_2<Segment_traits_2>   Polyline_traits_2;
+typedef CGAL::Arr_tracing_traits_2<Polyline_traits_2>   Traits_2;
+// typedef CGAL::Arr_polyline_traits_2<Segment_traits_2>   Traits_2;
 typedef Traits_2::Point_2                               Point_2;
 typedef Segment_traits_2::Curve_2                       Segment_2;
 typedef Traits_2::Curve_2                               Polyline_2;
@@ -24,38 +27,48 @@ typedef CGAL::Arrangement_2<Traits_2>                   Arrangement_2;
 int main ()
 {
 
-  Traits_2 traits;
+Traits_2 traits;
+traits.disable_all_traces();
+// traits.enable_trace(Traits_2::SPLIT_OP);
+traits.enable_trace(Traits_2::INTERSECT_OP);
+
   Traits_2::Construct_curve_2 polyline_construct =
     traits.construct_curve_2_object();
 
-  Arrangement_2         arr;
+Arrangement_2         arr(&traits);
 
   std::list<Point_2>    pts;
-  Point_2 p1(0,2);
-  Point_2 p2(-1,-1);
-  Point_2 p3(1,-1);
-  pts.push_back(p1);
-  pts.push_back(p2);
-  pts.push_back(p3);
-  pts.push_back(p1);
+  // Point_2 p1(0,2);
+  // Point_2 p2(-1,-1);
+  // Point_2 p3(1,-1);
+  // pts.push_back(p1);
+  // pts.push_back(p2);
+  // pts.push_back(p3);
+  // pts.push_back(p1);
+  pts.push_back(Point_2(-0, -7));
+  pts.push_back(Point_2(-7., 8));
+  pts.push_back(Point_2(-1, 6));
+  pts.push_back(Point_2(4, -9));
+  pts.push_back(Point_2(-7, -7));
+
   Polyline_2 poly1 = polyline_construct(pts.begin(), pts.end());
 
-  std::vector<Segment_2> segs;
-  Point_2 q1(-1,1);
-  Point_2 q2(0,-2);
-  Point_2 q3(1,1);
+  // std::vector<Segment_2> segs;
+  // Point_2 q1(-1,1);
+  // Point_2 q2(0,-2);
+  // Point_2 q3(1,1);
 
-  segs.push_back(Segment_2(q1,q3));
-  segs.push_back(Segment_2(q1,q2));
-  segs.push_back(Segment_2(q2,q3));
-  Polyline_2 poly2 = polyline_construct(segs.begin(), segs.end());
+  // segs.push_back(Segment_2(q1,q3));
+  // segs.push_back(Segment_2(q1,q2));
+  // segs.push_back(Segment_2(q2,q3));
+  // Polyline_2 poly2 = polyline_construct(segs.begin(), segs.end());
 
   // TODO: Make sure to construct all possible of polylines. That is, from
   //       ranges of points, ranges of segments, ranges with only one segment
   //       or only two points, etc.
 
   insert (arr, poly1);
-  insert (arr, poly2);
+  // insert (arr, poly2);
 
   // print_arrangement (arr);