The following trivial patch is needed to compile write_graphviz from today's CVS. Regards, Angus Index: graphviz.hpp =================================================================== RCS file: /cvsroot/boost/boost/boost/graph/graphviz.hpp,v retrieving revision 1.18 diff -u -p -r1.18 graphviz.hpp --- graphviz.hpp 12 Aug 2003 01:15:37 -0000 1.18 +++ graphviz.hpp 14 Aug 2003 11:15:49 -0000 @@ -249,7 +249,7 @@ namespace boost { GraphPropertiesWriter gpw) { typedef typename property_map<Graph, vertex_index_t>::const_type vimap_t; - vimap_t vertex_index = get(g, vertex_index_t()); + vimap_t vertex_index = get(vertex_index_t(), g); typedef typename graph_traits<Graph>::directed_category cat_type; typedef graphviz_io_traits<cat_type> Traits; std::string name = "G";