[Boost-users] array of small world graphs

Hi all, new to boost and experiencing a bit of an issue with generating a collection of small worlds. Basically i want for each pass of the loop to generate a small world with a certain pRewire. Here's some code typedef small_world_iterator SWGen; base_generator_type generator(1u); for(int i = 0; i < num_graphs; i++){ Graph g( SWGen( generator, N, k, pRewire, SWGen(), N ); . . some operations on g, i.e. path lengths e.t.c. } As it happens all graphs g are the same graph while what i want is a collection of different small worlds with the same pRewire. Why does the state of the generator not advance after the first Graph is generated? Can anyone please help me with this. Thanks for your time, Vasilis.