BRepMesh_FastDiscret doesn’t triangulate holes

Hi everybody,

I have a problem using BRepMesh_FastDiscret:

I create a face with a hole inside which I wanna triangulate.
Therefore I create first the outer face by a surf:

TColgp_Array2OfPnt array_2d(1, 2, 1, 2);
array_2d.SetValue(1,1, list_boundary_points_occ[0]);
array_2d.SetValue(1,2, list_boundary_points_occ[1]);
array_2d.SetValue(2,1, list_boundary_points_occ[3]);
array_2d.SetValue(2,2, list_boundary_points_occ[2]);
Handle(Geom_Surface) surf_handle = new Geom_BezierSurface(array_2d);
GeomAdaptor_Surface new_surface_adaptor(surf_handle);
BRepBuilderAPI_MakeFace whole_face_builder = BRepBuilderAPI_MakeFace();
whole_face_builder.Init(new_surface_adaptor.Surface());
whole_face_builder.Build();

Then I create a smaller wire representing the hole:

TopoDS_Wire wire_of_current_hole = …

And then I use “Add” to add the wire as hole to the face:

whole_face_builder.Add(wire_of_current_hole);

Everything’s fine, the resulting face includes the hole.
But when triangulating the face, the whole face without the hole is triangulated:
BRepMesh_FastDiscret mymesh(0.01,whole_face_builder.Face(), boundingBox, 30, true, true, false, true );

Does anyone know why?