The following code does not compile with Boost 1.36 and MSVS 2008: #define BOOST_FILESYSTEM_NO_DEPRECATED #include <boost/filesystem.hpp> In get the following error message: 1>C:\Program Files\Boost\boost_1_36_0\boost/filesystem/convenience.hpp(98) : error C2275: 'boost::filesystem::path' : illegal use of this type as an expression 1> C:\Program Files\Boost\boost_1_36_0\boost/filesystem/path.hpp(49) : see declaration of 'boost::filesystem::path' 1>C:\Program Files\Boost\boost_1_36_0\boost/filesystem/convenience.hpp(100) : error C2275: 'boost::filesystem::wpath' : illegal use of this type as an expression 1> C:\Program Files\Boost\boost_1_36_0\boost/filesystem/path.hpp(65) : see declaration of 'boost::filesystem::wpath' 1>C:\Program Files\Boost\boost_1_36_0\boost/filesystem/convenience.hpp(103) : error C2275: 'boost::filesystem::path' : illegal use of this type as an expression 1> C:\Program Files\Boost\boost_1_36_0\boost/filesystem/path.hpp(49) : see declaration of 'boost::filesystem::path' 1>C:\Program Files\Boost\boost_1_36_0\boost/filesystem/convenience.hpp(105) : error C2275: 'boost::filesystem::wpath' : illegal use of this type as an expression 1> C:\Program Files\Boost\boost_1_36_0\boost/filesystem/path.hpp(65) : see declaration of 'boost::filesystem::wpath' 1>C:\Program Files\Boost\boost_1_36_0\boost/filesystem/convenience.hpp(108) : error C2275: 'boost::filesystem::path' : illegal use of this type as an expression 1> C:\Program Files\Boost\boost_1_36_0\boost/filesystem/path.hpp(49) : see declaration of 'boost::filesystem::path' 1>C:\Program Files\Boost\boost_1_36_0\boost/filesystem/convenience.hpp(110) : error C2275: 'boost::filesystem::wpath' : illegal use of this type as an expression 1> C:\Program Files\Boost\boost_1_36_0\boost/filesystem/path.hpp(65) : see declaration of 'boost::filesystem::wpath' --Johan Råde