I think that perhaps I no longer have a property_map for vertex position? Does that make sense? I think that happened in a bit of magic that I had to comment out: //enum vertex_position_t { vertex_position }; //namespace boost { BOOST_INSTALL_PROPERTY(vertex, position); } Now, I'm not sure what to pass in as the second parameter to the layout functions like: random_graph_layout(graph, <?>, topology); I'm not sure if the property_map was created for me and I can get it using: get(<?>, graph); Or if I have to create one ... and what the syntax should be for the creation. -- View this message in context: http://boost.2283326.n4.nabble.com/Trouble-w-fruchterman-reingold-tp4636494p... Sent from the Boost - Users mailing list archive at Nabble.com.