Hello, I tried to compile and run in VS 2008 the following example illustrating how to use read_graphviz() function: #include <boost/graph/graphviz.hpp> #include <boost/graph/adjacency_list.hpp> #include <string> #include <sstream> using namespace boost; using namespace std; int main() { // Vertex properties typedef property < vertex_name_t, std::string, property < vertex_color_t, float > > vertex_p; // Edge properties typedef property < edge_weight_t, double > edge_p; // Graph properties typedef property < graph_name_t, std::string > graph_p; // adjacency_list-based type typedef adjacency_list < vecS, vecS, directedS, vertex_p, edge_p, graph_p > graph_t; // Construct an empty graph and prepare the dynamic_property_maps. graph_t graph(0); dynamic_properties dp; property_map<graph_t, vertex_name_t>::type name = get(vertex_name, graph); dp.property("node_id",name); property_map<graph_t, vertex_color_t>::type mass = get(vertex_color, graph); dp.property("mass",mass); property_map<graph_t, edge_weight_t>::type weight = get(edge_weight, graph); dp.property("weight",weight); // Use ref_property_map to turn a graph property into a property map boost::ref_property_map<graph_t*,std::string> gname(get_property(graph,graph_name)); dp.property("name",gname); // Sample graph as an std::istream; std::istringstream gvgraph("digraph { graph [name=\"graphname\"] a c e [mass = 6.66] }"); bool status = read_graphviz(gvgraph,graph,dp,"node_id"); return 0; } When I run the program I get the Debug Assertion Failed message (when I delete the line with read_graphviz everything is OK). Could you please help me with this problem? Thank you, Anna.