Hi, I'm not really sure but I think there are some missing inline declarations in "convenience.hpp" and "fstream.hpp" of Boost.fileystem for the I18N branch. I've joined the patched files Could you confirm these observations? Marc Viala www.acticm.com <http://www.acticm.com> mailto:mviala@acticm.com <mailto:mviala@acticm.com>