c++ - Visual Studio not finding boost include files in release mode (works in debug) -

i'm using boost visual studio 2013 express.

visual studio finds #include <boost/filesystem.hpp> in debug mode, not in release mode.

when try compile in release mode, says:

error 1 error c1083: cannot open include file: 'boost/filesystem.hpp': no such file or directory

when right click on #include directive open file manually, works in debug configuration, again not in release, there says:

file 'boost/filesystem.hpp' not found in current source file's directory or in build system paths.

i checked build configurations ,

• c/c++ - > general -> "additional include directories"
• linker -> general -> "additional library directories"
• linker -> input -> "additional dependencies"

are same both configurations.

do need edit "build system paths", error says? thought 3 options above do.

what else cause problem?

double-check you've checked settings of project actual failed build. had same issue when using boost::optional. overlooked project (unittests) failing, rather project suspected (cppplaygroundlib) due misinterpreting build output focussing on line containing error message:

1>------ build started: project: unittests, configuration: release win32 ------

1> footests.cpp

1>c:\projects\playground\cppplayground\cppplaygroundlib\foo.h(3): fatal error c1083: cannot open include file: 'boost/optional/optional.hpp': no such file or directory

========== build: 0 succeeded, 1 failed, 2 up-to-date, 0 skipped ==========

after had added missing boost path in c/c++->general->additional include directories solution compiled successfully.