Hi, $ cat test.cpp #include <stdexcept> #include <iostream> #include <boost/filesystem/path.hpp> int main() { try { boost::filesystem::path p("/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.3/include/g++-v3/"); } catch( std::exception &e ) { std::cout << e.what() << std::endl; } catch(...) { std::cout << "Unknown exception" << std::endl; } } $ g++ test.cpp -o test -lboost_filesystem $ ./test boost::filesystem::path: invalid name "g++-v3" in path: "/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.3/include/g++-v3/" Is that supposed to happen? Regards, Andreas Pokorny