Hi, I am trying to learn PBGL. I am using VS2008 on Win 7. I had built and installed open mpi 1.4.3, HPC Pack 2008 SDK, and Boost library 1.46.1 with "bjam --with-mpi --with-graph_parallel". I had set include and library directory for the above 3 libraries in VS2008. The additional dependency set for the project is "libboost_*mpi*-vc90-mt-gd.lib libboost_*serialization*-vc90-mt-gd.lib libboost_wserialization-vc90-mt-gd.lib libboost_graph-vc90-mt-gd.lib libboost_*graph_parallel*-vc90-mt-gd.lib libboost_system-vc90-mt-gd.lib libmpi_cxxd.lib libmpid.lib libopen-pald.lib libopen-rted.lib msmpi.lib" Here are the major references I had referred which helped to reduce errors significantly: http://terboven.wordpress.com/2008/09/09/building-and-using-boostmpi-on-wind... http://lists.boost.org/boost-users/2009/11/54042.php However, while compiling D:\Development\boost_1_46_1\libs\graph_parallel\example\breadth_first_search.cpp on my machine, I still got the following 4 link errors: Error 4 error LNK2019: unresolved external symbol "*private: struct ompi_datatype_t * __thiscall boost::mpi::detail::mpi_datatype_map::get(class type_info const *)*" breadth_first_search.obj Error 3 error LNK2019: unresolved external symbol "*private: void __thiscall boost::mpi::detail::mpi_datatype_map::set(class type_info const *,struct ompi_datatype_t *)*" breadth_first_search.obj Error 2 error LNK2019: unresolved external symbol "*public: __thiscall boost::mpi::communicator::operator struct ompi_communicator_t *(void)const*" breadth_first_search.obj Error 1 error LNK2019: unresolved external symbol "void __cdecl boost::detail::bfs_helper<class boost::adjacency_list<struct boost::vecS,struct boost::distributedS<class boost::graph::distributed::mpi_process_group,struct boost::vecS,struct boost::defaultS>......" breadth_first_search.obj Am I missing something here? Thanks, Tao Yu http://about.me/Tao_Yu