I'm using an edge visitor to create subgraphs. I do a simple sub_graph = myGraph.create_subgraphs(), to create a subgraph and then I add vertices using add_vertex(vertex,sub_graph). The vertices are added but the corresponding edges are not. My basic typedefs are: ////////// typedef boost::property<boost::edge_index_t, int> Tmp; typedef boost::property<boost::edge_info_t, GES_EdgeInfo, Tmp> GES_EdgeProperty; typedef boost::property<boost::vertex_color_t, int> Tmp2; typedef boost::property<boost::vertex_self_t, SYS_String, Tmp2> Tmp3; typedef boost::property<boost::vertex_name_t, SYS_String, Tmp3> GES_VertexProperty; typedef boost::adjacency_list< boost::vecS, boost::vecS ,boost::directedS ,GES_VertexProperty ,GES_EdgeProperty> GES_AdjacencyList; typedef boost::subgraph<GES_AdjacencyList> GES_RTGraph; ////////// That is, the graph type is the same as the sub-graph type, which I think is right? Does anybody have any idea why the edges aren't being transferred to the sub-graph?