Hi everybody! I'm trying to initialize my adjacency_list graph via an EdgeIterator. Since I do not want parallel edges to be present in my graph, but still use vecS as EdgeList-storage because of memory considerations, my EdgeIterator needs somehow a reference to the graph under construction. Some code might explain it better: typedef boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS > graph_t; typedef boost::my_edge_iterator<base_rand_gen_t, graph_t> SFGen; graph_t bg = graph_t(SFGen(bg, base_rand, 100), SFGen(), 100); This code compiles fine, but seg-faults immediatly since bg does not seem to be defined when my iterator gets constructed. A solution would be to provide a add_edge_range-function which gets as input the EdgeIterator and the corresponding empty boost graph. This function would then build up the graph or is there a better way to do this? Thanks a lot in advance for your help. Greetings, Sebastian