Same experience for me, but with multithread statically linked. The library was libboost_filesystem-vc71-mt-sgd-1_32.lib As for building the libraries, I followed instructions for building with boost.jam with good success. "Sean DeNigris" wrote in message news:0IEH009QUHU8MW@mta1.srv.hcvlny.cv.net... I got the posted code to pass with VC7.1, /MDd and /Zc:wchar_t. ------------------------------------------------------------------------------ _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users