Hi, On December 7th I've posted this message, which unfortunately didn't get any reply. I'm not a professional programmer, so forgive me if it is a silly question, but your cooperation will help me understand boost better, thank you and happy new year to all. --- In Boost-Users@yahoogroups.com, "ksaleh2 <ksaleh2@y...>" <ksaleh2@y...> wrote:

I'm trying boost for the first time on Codewarrior 8.0 for windows. The Boost version is 1.25.1 from the "Boost Graph Library" accompanying CD. The offensive code is :

#include <boost/config.hpp> #include <iostream>

#include <boost/graph/adjacency_list.hpp>

using namespace boost; using namespace std;

int main() { typedef adjacency_list<vecS,vecS,directedS, property < vertex_name_t, char ,property<edge_weight_t,double>

...

Graph;

property_map < Graph, vertex_name_t >::type name_map ; property_map < Graph, edge_weight_t >::type value_map ;

Graph g;

typename graph_traits<Graph>::vertex_descriptor a,b;

a = add_vertex(g); name_map[a] = 'a'; b = add_vertex(g); name_map[b] = 'b';

typename graph_traits<Graph>::edge_descriptor ed; bool inserted;

tie(ed, inserted) = add_edge(a, b, g); value_map[ed] = 1.2;

return 0; }

If the second template parameter for class VertexListS is replaced with listS it compiles and run normally.

typedef adjacency_list<vecS,listS,directedS, property < vertex_name_t, char ,property<edge_weight_t,double>

...

Graph;

Can you please advise why?

Best Regards