Hi Everyone, It seems like there's a problem with the following include sequence: #include <boost/graph/adjacency_list.hpp> #include <boost/graph/graph_utility.hpp> #include <boost/graph/visitors.hpp> #include <boost/graph/breadth_first_search.hpp> #include <boost/algorithm/string.hpp> GCC 4.1.2 complains that boost::contains and boost::all is already defined. The compiler complains that boost/boost/algorithm/predicate.hpp is trying to define 'contains' and 'all' which apparently is already defined somewhere in the Boost.Graph headers. I would submit a patch, but I didn't know whether to touch Boost.Graph or String Algorightms and how. (Using latest CVS checkout May 30) HTH -- Dean Michael C. Berris http://cplusplus-soup.blogspot.com/ mikhailberis AT gmail DOT com +63 928 7291459