But after add path to cstdlib I got following error: 1>d:\boostlib\boost\tr1\detail\config_all.hpp(150) : error C1083: Cannot open include file: '../include/utility': No such file or directory I've checked config_all.hpp found following line generate the error #define BOOST_TR1_STD_HEADER(name) <../include/name> and tried to modify this line , make it point to my utility file but got more errors 1>errors in directory e:\src\matrix\test 1>d:\winddk\7600.16385.0\inc\api\crt\stl70\iosfwd(202) : error C2144: syntax err or : 'int' should be preceded by ';' 1>d:\winddk\7600.16385.0\inc\api\crt\stl70\iosfwd(202) : error C2143: syntax err or : missing ';' before '*' 1>d:\winddk\7600.16385.0\inc\api\crt\stl70\iosfwd(202) : error C2061: syntax err or : identifier '_Elem' 1>d:\winddk\7600.16385.0\inc\api\crt\stl70\iosfwd(209) : error C2143: syntax err or : missing ';' before '*' 1>d:\winddk\7600.16385.0\inc\api\crt\stl70\iosfwd(209) : error C2086: 'int std:: char_traits<_Elem>::_Elem' : redefinition ... I'm totally confused