Hi, I am trying to port a 32bit application built on 32bit windows to 64bit. We are using boost::regex library. We have successfully built 64 bit version of boost. When we try to link our application with boost::regex we get the following error. What could be the reason? We are using MS Windows 7 64bit, MS Visual studio 2010, and boost 1.46.1 This is the how we built boost # bjam --build-type=minimal --with-regex --address-model=64 This is the error reported. myfile.obj : error LNK2001: unresolved external symbol "private: class boost::basic_regex > & __cdecl boost::basic_regex >::do_assign(char const *,char const *,unsigned int)" (?do_assign@?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@boost@@AEAAAEAV12@PEBD0I@Z) myfile.obj : error LNK2001: unresolved external symbol "private: void __cdecl boost::re_detail::perl_matcher >,struct boost::regex_traits

::construct_init(class boost::basic_regex > const &,enum boost::regex_constants::_match_flags)" (?construct_init@?$perl_matcher@PEBDV?$allocator@U?$sub_match@PEBD@boost@@@std@@U?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@re_detail@boost@@AEAAXAEBV?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@3@W4_match_flags@regex_constants@3@@Z)

myfile.obj : error LNK2001: unresolved external symbol "public: bool __cdecl boost::re_detail::perl_matcher >,struct boost::regex_traits

::find(void)" (?find@?$perl_matcher@PEBDV?$allocator@U?$sub_match@PEBD@boost@@@std@@U?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@re_detail@boost@@QEAA_NXZ)

Thanks, Lloyd