Hi, I'm trying to get a simple undirected_dfs example to work. The aim is simple, to create an undirected graph and print its nodes in DFS order. Here's my code: ///////////////////////////////////////////////////////////////////////////////////// #include <boost/graph/adjacency_list.hpp> #include <boost/graph/undirected_dfs.hpp> #include <iostream> using namespace std; typedef boost::adjacency_list<boost::listS, boost::vecS, boost::undirectedS> MyGraph; typedef boost::graph_traits<MyGraph>::vertex_descriptor MyVertex; typedef boost::graph_traits<MyGraph>::edge_descriptor MyEdge; class MyVisitor : public boost::default_dfs_visitor { public: void discover_vertex(MyVertex v, const MyGraph& g) const { cerr << v << endl; } }; int main() { MyGraph g; boost::add_edge(0, 1, g); boost::add_edge(0, 2, g); boost::add_edge(1, 3, g); MyVisitor vis; boost::undirected_dfs(g, boost::visitor(vis)); return 0; } ///////////////////////////////////////////////////////////////////////////////////// I get the following errors which just make no sense to me: ///////////////////////////////////////////////////////////////////////////////////// Error 1 error C2780: 'void boost::put(T Bundle::* ,boost::adjacency_list<OutEdgeListS,VertexListS,DirectedS,VertexProperty,EdgeProperty,GraphProperty,EdgeListS> &,const Key &,const T &)' : expects 4 arguments - 3 provided d:\boost\boost\graph\undirected_dfs.hpp 149 Error 2 error C2780: 'void boost::put(Property,boost::adj_list_helper<Config,Base> &,const Key &,const Value &)' : expects 4 arguments - 3 provided d:\boost\boost\graph\undirected_dfs.hpp 149 Error 3 error C2784: 'void boost::put(const boost::put_get_helper<Reference,PropertyMap> &,K,const V &)' : could not deduce template argument for 'const boost::put_get_helper<Reference,PropertyMap> &' from 'boost::detail::error_property_not_found' d:\boost\boost\graph\undirected_dfs.hpp 149 Error 4 error C2784: 'void boost::put(const boost::writable_property_map_archetype<KeyArchetype,ValueArchetype> &,const writable_property_map_archetype<KeyArchetype,ValueArchetype>::key_type &,const writable_property_map_archetype<KeyArchetype,ValueArchetype>::value_type &)' : could not deduce template argument for 'const boost::writable_property_map_archetype<KeyArchetype,ValueArchetype> &' from 'boost::detail::error_property_not_found' d:\boost\boost\graph\undirected_dfs.hpp 149 Error 5 error C2784: 'void put(T *,ptrdiff_t,const V &)' : could not deduce template argument for 'T *' from 'boost::detail::error_property_not_found' d:\boost\boost\graph\undirected_dfs.hpp 149 ///////////////////////////////////////////////////////////////////////////////////// What am I doing wrong? How do I get to print nodes in DFS order? I'm on VC++ 2008 Express Edition. I have looked at the undirected_dfs example given here: <http://www.boost.org/doc/libs/1_35_0/libs/graph/example/undirected_dfs.cpp> That code seems to be trying to achieve something else. TIA, ~ash -- Groucho Marx - "A hospital bed is a parked taxi with the meter running."