Hi Robert I did template specialization of basic_text_iprimitive::load for double, and it works with visual studio 2010 compiler. Do you see something problematic with this code namespace boost { namespace archive { template<> template<> void basic_text_iprimitive< std::basic_istream<wchar_t, std::char_traits<wchar_t>> >::load<double>(double& t) { if (!is.fail()) { std::wstring s; getline(is, s, L'<'); is.putback(L'<'); int index = s.find(L"IND"); if (index != -1) { t = std::numeric_limits<double>::quiet_NaN(); return; } index = s.find(L"NAN"); if (index != -1) { t = std::numeric_limits<double>::quiet_NaN(); return; } index = s.find(L"INF"); if (index != -1) { t = std::numeric_limits<double>::infinity(); return; } t = std::stod(s); return; } boost::serialization::throw_exception( archive_exception(archive_exception::input_stream_error) ); } } } -- View this message in context: http://boost.2283326.n4.nabble.com/serialization-Nans-and-infinity-in-wide-x... Sent from the Boost - Users mailing list archive at Nabble.com.