Hello, I've bought the book (BGL) and am trying to compile boost_1_27_0/boost/libs/example/adjacency_list.cpp but... ...MSVC6 spits out the dreaded "fatal error C1001: INTERNAL COMPILER ERROR". Intel 5's first (of many) error is e:/boost_1_27_0/boost/detail/iterator.hpp(204) : error: class "std::list<_Ty, _A>::iterator [with _Ty=boost::list_edge<boost::detail::adj_list_gen<boost::adjacency_list<boost ::vecS, boost::listS, boost::undirectedS, boost::property<boost::vertex_ind ex_t, size_t={unsigned int}, boost::property<boost::vertex_color_t, boost::default_color_type, boost::no_property>>, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits<char>, std::allocator<char>>}, boost::no_property>, boost::no_property, boost::listS>, boost::listS, boost::vecS, boost::undirectedS, boost::property<boost::vertex_index_t, size_t={unsigned int}, boost::property<boost::vertex_color_t, boost::default_color_type, boost::n o_property>>, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits<char>, std::allocator<char>>}, boost::no_property>, boost::no_property, boost::listS>::config::vertex_descriptor={boost::adjacency_list_traits<boost ::vecS, boost::listS, boost::undirectedS>::vertex_descriptor={boost::ct_if_t<boost::adjacency_list _traits<boost::vecS, boost::listS, boost::undirectedS>::is_rand_a ccess={boost::detail::is_random_access<boost::listS>::type={boost::false_typ e}}, size_t={unsigned int}, boost::adjacency_list_traits<boost::vecS, boost::listS, boost::undirectedS>::vertex_ptr={void *}>::type={boost::adjacency_list_traits<boost::vecS , boost::listS, boost::undirectedS>::vertex_ptr={void *}}}}, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits<char>, std::allocator<char>>}, boost::no_property>>, _A=std::allocator<boost::list_edge<bo ost::detail::adj_list_gen<boost::adjacency_list<boost::vecS, boost::listS, boost::undirectedS, boost::property<boost::vertex_index_t, size_t={unsigned int}, boost::property<boost::vertex_color_t, boost::default_color_type, boost::no_property>>, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits<char>, std::allocator<char>>}, boost::no_property>, boost::no_property, boost::listS>, boost::listS, boost::vecS, boost::undirectedS, boost::property <boost::vertex_index_t, size_t={unsigned int}, boost::property<boost::vertex_color_t, boost::default_color_type, boost::no_property>>, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits<char>, std::allocator<char>>}, boost::no_property>, boost::no_property, boost::listS>::config::vertex_descriptor={boost::adjacency_list_traits<boost ::vecS, boost::listS, boost::undirectedS>::vertex_descriptor={boost::ct_if_t<boost::adjacency_list _traits<boost::vecS, boost::listS, boost::undirectedS>::is_rand_access={boost::detail::is_random_access<boost:: listS>::type={boost::false_type}}, size_t={unsigned int}, boost::adjacency_list_traits<boost::vecS, boost::listS, boost::undirectedS>::vertex_ptr={void *}>::type={boost::adjacency_list_traits<boost::vecS, boost::listS, boost::undirectedS>::vertex_ptr={void *}}}}, boost::property<boost::edge_name_t, std::string={std::basic_string<char, std::char_traits <char>, std::allocator<char>>}, boost::no_property>>>]" has no member "difference_type" typedef typename Iterator::difference_type difference_type; My last hope gcc 2.95.2 comes up with... In file included from e:\boost_1_27_0\boost\detail\numeric_traits.hpp:69, from e:\boost_1_27_0\boost\counting_iterator.hpp:57, from e:\boost_1_27_0\boost\pending\integer_range.hpp:15, from e:\boost_1_27_0\boost\graph\detail\adjacency_list.hpp:34, from e:\boost_1_27_0\boost\graph\adjacency_list.hpp:293, from adjacency_list.cpp:31: e:\boost_1_27_0\boost\cstdint.hpp:163: parse error e:\boost_1_27_0\boost\cstdint.hpp:171: #error defaults not correct; you must hand modify boost/cstdint.hpp I'd like to get it working with MSVC6 or Intel5. Any help much appreciated. Louis.