Hi, I am compiling a very simple application using boost filesystem. However it is giving following error message: "undefined reference to `boost::filesystem2::no_check(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'" Here is the simple application source: --------------------------------Sample application source: #include <stdio.h> #include <boost/filesystem.hpp> int main() { std::string m_FileName(boost::filesystem::path("testfile1.txt", boost::filesystem::no_check).native_file_string()); printf("Testboost.....%s\n", m_FileName.c_str()); return 0; } -------------------------------- More Details: Libraries being used: libboost_filesystem-gcc41-mt-1_44.a libboost_system-gcc41-mt-1_44.a Boost version: 1.44.0 Boost was build using command: bjam --build-type=complete --layout=versioned Operating System: Linux CentOS5.2 Any help in this regard will be appreciated. Asif