Hi, I am using following declaration to define subgraphs over undirected graph such that parallel edges are disallowed: typedef boost::adjacency_list, property > ImplGraph_t; typedef boost::subgraph embeddedGraph_t; that is use setS for EdgeList instead of listS. However when I call the function local_to_global over the subgraph i end up following errors: /home/sandeep/Computing/boost_1_38_0/boost/graph/subgraph.hpp:147: error: passing ‘const std::vector >’ as ‘this’ argument of ‘typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type::reference std::vector<_Tp, _Alloc>::operator[](size_t) [with _Tp = void*, _Alloc = std::allocator]’ discards qualifiers /home/sandeep/Computing/boost_1_38_0/boost/graph/subgraph.hpp:147: error: invalid conversion from ‘void*’ to ‘unsigned int’ /home/sandeep/Computing/boost_1_38_0/boost/graph/subgraph.hpp:147: error: initializing argument 1 of ‘typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type::reference std::vector<_Tp, _Alloc>::operator[](size_t) [with _Tp = void*, _Alloc = std::allocator]’ Please find the full code that creates the above scenario. Appreciate any help. -Thanks sandeep ///////////////-----------------------Undirected_Subgraph.cpp----------------------------- #include #include using namespace boost; typedef boost::adjacency_list, property > ImplGraph_t; typedef boost::subgraph embeddedGraph_t; int main() { embeddedGraph_t G; typedef graph_traits::vertex_descriptor vertex_t; vertex_t v; embeddedGraph_t& G1 = G.create_subgraph(); G.local_to_global(v); return 0; }