bug in filesystem::wpath. In mirgrating to support wchar_t, a couple of lines were missed. m_path which has type of std::wstring is assigned a narrow character string resulting in a compilation error. inline below is a patch: +++ C:\Boost_CVS\CVSROOT\boost\boost\filesystem\path.hpp Wed Feb 22 22:52:11 2006 @@ -249,8 +249,8 @@ ~basic_path() {} // assignments - basic_path & operator=( const string_type & s ) { m_path=""; operator/=( s ); return *this; } - basic_path & operator=( const value_type * s ) { m_path=""; operator/=( s ); return *this; } + basic_path & operator=( const string_type & s ) { m_path.clear(); operator/=( s ); return *this; } + basic_path & operator=( const value_type * s ) { m_path.clear(); operator/=( s ); return *this; } # ifndef BOOST_NO_MEMBER_TEMPLATES template <class InputIterator> basic_path & assign( InputIterator first, InputIterator last ) I've taken a look for similar bugs and couldn't find any. Thanks