Dear All, I am using Boost library version 1.34.1 in VC7.1 sp1. I don't know why I always fail with linking Boost Serialization and STLport library. But I can successfully build with Boost Serialization with VC7.1 build-in STL library. Do I need to modify my STLport library for Boost? I try STLport v5.1.5, v5.0.3, and v4.6.2. both of these version of STLport also fail in Linking process. Thank you. Kevin Tang. Linking... Creating library *Debug/iSentenceRecognizer.lib* and object *Debug/iSentenceRecognizer.exp* *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: __thiscall *boost::archive::text_oarchive_impl*<class boost::archive::text_oarchive>::text_oarchive_impl<class boost::archive::text_oarchive>(...)/ *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: __thiscall *boost::archive::text_iarchive_impl*<class boost::archive::text_iarchive>::text_iarchive_impl<class boost::archive::text_iarchive>//(...)/ *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: __thiscall *boost::archive::basic_text_oprimitive*<class _STL::basic_ostream<char,class _STL::char_traits<char> >

::~basic_text_oprimitive<class _STL::basic_ostream<char,class _STL::char_traits<char> > >(void)" //(...)/ *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: __thiscall *boost::archive::basic_text_iprimitive*<class _STL::basic_istream<char,class _STL::char_traits<char> > ::~basic_text_iprimitive<class _STL::basic_istream<char,class _STL::char_traits<char> > >(void)" //(...)/ *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: void __thiscall *boost::archive::text_oarchive_impl*<class boost::archive::text_oarchive>::save(class _STL::basic_string<char,class _STL::char_traits<char>,class _STL::allocator<char> > const &)"/ /(...)/ *iSentenizer.obj :* *error LNK2019:* /unresolved external symbol "public: void __thiscall *boost::archive::text_iarchive_impl*<class boost::archive::text_iarchive>::load(class _STL::basic_string<char,class _STL::char_traits<char>,class _STL::allocator<char> > &)"/ /(...)/ Y:\2008\iSentenceRecognition\iSentenceRecognition/Debug/iSentenceRecognizer.dll : *fatal error LNK1120: 6 unresolved externals*