Good day everyone, i'm using the boost::date_time::posix_time libarary in my application. When ever i compile i get lots of warning. mostly its about not being able to generate copy constructors from the lexical_cast lbrary and a whole lot of "C4127 conditional experssion is constant. OS: windows 2000 server Compiler: MSVC 7.1 is this normal or am i missing something here? the boost lib was compiled with the msvc_71 toolset. D:\boost_1_33_0\boost\lexical_cast.hpp(191) : warning C4511: 'boost::detail::lexical_stream<Target,Source>' : copy constructor could not be generated with [ Target=short, Source=NewSource ] D:\boost_1_33_0\boost\lexical_cast.hpp(218) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=short, Source=NewSource ] D:\boost_1_33_0\boost\date_time\time_parsing.hpp(201) : see reference to function template instantiation 'Target boost::lexical_cast<short,Type>(const Source &)' being compiled with [ Target=short, Type=std::string, Source=std::string ] D:\boost_1_33_0\boost\date_time\time_parsing.hpp(275) : see reference to function template instantiation 'time_duration boost::date_time::parse_undelimited_time_duration<time_duration>(const std::string &)' being compiled with [ time_duration=time_duration ] D:\boost_1_33_0\boost\date_time\posix_time\time_parsers.hpp(35) : see reference to function template instantiation 'time_type boost::date_time::parse_iso_time<boost::posix_time::ptime>(const std::string &,char)' being compiled with [ time_type=boost::posix_time::ptime ] D:\boost_1_33_0\boost\lexical_cast.hpp(191) : warning C4512: 'boost::detail::lexical_stream<Target,Source>' : assignment operator could not be generated with [ Target=short, Source=NewSource ] D:\boost_1_33_0\boost\lexical_cast.hpp(137) : warning C4127: conditional expression is constant D:\boost_1_33_0\boost\lexical_cast.hpp(133) : while compiling class-template member function 'boost::detail::lexical_stream<Target,Source>::lexical_stream(void)' with [ Target=short, Source=NewSource ] D:\boost_1_33_0\boost\lexical_cast.hpp(218) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=short, Source=NewSource ] D:\boost_1_33_0\boost\date_time\time_parsing.hpp(201) : see reference to function template instantiation 'Target boost::lexical_cast<short,Type>(const Source &)' being compiled with [ Target=short, Type=std::string, Source=std::string ] D:\boost_1_33_0\boost\lexical_cast.hpp(139) : warning C4127: conditional expression is constant cheers.