Hi all, yes, I know, there has been a thread some days ago, but I just registered and don't know how to reply to a mail that I don't have. Anyway, there seems to be a bug in boost 1.34.1 with VC 2005 when using directory_iterator. I used the filesystem before and everything worked fine. Now (since I use the iterator), I get 1>HD2.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""unsigned int boost::filesystem::detail::not_found_error" (?not_found_error@detail@filesystem@boost@@3IA)" in Funktion ""private: unsigned int __thiscall boost::filesystem::basic_directory_iterator<class boost::filesystem::basic_path<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct boost::filesystem::path_traits> >::m_init(class boost::filesystem::basic_path<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,struct boost::filesystem::path_traits> const &)" (?m_init@?$basic_directory_iterator@V?$basic_path@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@Upath_traits@filesystem@boost@@@filesystem@boost@@@filesystem@boost@@AAEIABV?$basic_path@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@Upath_traits@filesystem@boost@@@23@@Z)". I looked into the filesystem dll with depends and found the function there with ordinal 48 (0x30) (in both the debug and the release Version for multithreading). Also in the lib, I found it. Rather strange. The signatures of the linker and the ones found in the DLL also match. I used the installer from Boost-Consulting. In the thread some time ago, a responder claimed, he could compile successfully. Maybe he used a self-compiled boost version? I am going to test that, but maybe somebody has an answer right now? Best regards, Rainer Thaden