I just upgraded to the latest .zip file from John's web site. Now I can't seem to link. It can't find add_appender. This code built previously. Any idea what's going on? Am I not building the logging library correctly? I just cd to boot_root\libs\log\build, call "vcvars32.bat", then "bjam". It seems to build. If this line is uncommented: manipulate_logs("*").add_appender(write_to_cout); I get: AppMsg.obj : error LNK2019: unresolved external symbol "void __cdecl boost::logging::add_appender(struct boost::logging::default_log_manager &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class boost::function2<void,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::allocator<class boost::function_base> >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,int)" (?add_appender@logging@boost@@YAXAAUdefault_log_manager@12@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$function2@XABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@ABV12@V?$allocator@Vfunction_base@boost@@@2@@2@1H@Z) referenced in function "void __cdecl boost::logging::add_appender(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class boost::function2<void,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class std::allocator<class boost::function_base> >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,int)" (?add_appender@logging@boost@@YAXABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$function2@XABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@ABV12@V?$allocator@Vfunction_base@boost@@@2@@2@0H@Z)