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[gerth <>]

Hi!
I have a problem using the constrained Delauny Triangulation in CGAL. So,
previously I tried to mesh a polygon with the Delaunay_mesher_2. I inserted
the vertices v1...vN of the polygon using
   v1=cdt.insert(Point(x1,y1))
   v2=cdt.insert(Point(x2,y2))
   ...........

and the constraints using
   cdt.insert_constraint(v1, v2);
   cdt.insert_constraint(v2, v3);
   ............

I set the mesh criteria and called refine_mesh() which yielded good results.
Now i want to insert additional constrained lines within the polygon.
Typically this constrained lines begin and end either on a vertex
(v1,...,vN) or somewhere on the constrained lines, that I already inserted.
The problem arises, if I try to insert a new vertex that lies on a
constraint edge. In this case I get an error

Unhandled exception at 0x00435d1e in gui.exe: 0xC0000005: Access violation
writing location 0x0000000c

What am I doing wrong? Is it even possible to insert a new vertex that lies
on a previously defined constrained edge?



        



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