Thanks! (And, sorry for the late response)

Doug

No problem, except that in <boost/graph/graph_concepts.hpp>, some of the constructor declarations are now misplaced (i.e. residing in the definitions of other classes), because I created my patch before you moved the classes to the boost::concepts namespace. Cromwell D. Enage __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com