On Nov 17, 2007 4:30 AM, mahmoodn <nt_mahmood@xxxxxxxxx> wrote: > > template <class Gt, class Tds > > typename Triangulation_2<Gt, Tds>::Finite_edges_iterator > Triangulation_2<Gt, Tds>:: > finite_edges_begin() const It looks like finite_edges_begin() returns a different type here than Sdg_2::Finite_edges_iterator eit. Does Segment_Delaunay_graph_hierarchy_2 derive from Triangulation_2? If it is based on Triangulation_2 and if you read the link I sent, you'll see that the call to finite_edges_begin() is probably non-dependent and so needs to have YourBaseClass<YuorTemplateTypenames>:: or this-> in front of it. corey
