Hello all. I'm having issues getting property maps to work properly with my custom adjacency_list. Here's a snippet of the code: // Definitions // define some of the properties the graphs will have // http://www.boost.org/doc/libs/1_42_0/libs/graph/doc/using_adjacency_list.htm... struct posx_t { typedef vertex_property_tag kind; }; struct posy_t { typedef vertex_property_tag kind; }; typedef property<posx_t, int> VertexPosX; // chain to add in posy typedef property<posy_t, int, VertexPosX> VertexPos; // chain to add in vertex_index typedef property<vertex_index_t, int, VertexPos> VertexProperty; // define our special graph typedef adjacency_list<listS, listS, undirectedS, VertexProperty, property<edge_weight_t, int> > AGraph; ... template<class T> void boostToVAGraph(const AGraph & g, const int num_nodes, const int num_edges, T ** idata, T ** odata, unsigned int ** segment_descriptor, unsigned int ** cross_pointers, unsigned int ** head_flags, T ** reference, const testrigOptions & testOptions) { typedef AGraph Graph; // define the manipulator for our special properties // http://www.boost.org/doc/libs/1_42_0/libs/graph/doc/using_adjacency_list.htm... // requires property_map.hpp // BROKEN!!!!! property_map<AGraph, posx_t>::type getposx = get(posx_t(), g); property_map<AGraph, posy_t>::type getposy = get(posy_t(), g); ... I used another function to generate the AGraph and apply values. And using property map there seems to work. However, I then pass it to this function using: boostToVAGraph(g, num_nodes, num_edges, idata, odata, segment_descriptor, cross_pointers, head_flags, reference, testOptions); On compile, I get this error: 1>agraph.cpp 1>c:/Documents and Settings/All Users/Application Data/NVIDIA Corporation/NVIDIA GPU Computing SDK/C/src/test/agraph.cpp(94) : error C2440: 'initializing' : cannot convert from 'boost::adj_list_vertex_property_map<Graph,ValueType,Reference,Tag>' to 'boost::adj_list_vertex_property_map<Graph,ValueType,Reference,Tag>' 1> with 1> [ 1> Graph=AGraph, 1> ValueType=int, 1> Reference=const int &, 1> Tag=posx_t 1> ] 1> and 1> [ 1> Graph=AGraph, 1> ValueType=int, 1> Reference=int &, 1> Tag=posx_t 1> ] 1> No constructor could take the source type, or constructor overload resolution was ambiguous Ideas? -Trevin "new to Boost" Murakami