Hello, I am trying to build MPI on WinXP, Visual C++ 2008 Express edition, trying to follow instructions at http://www.boost.org/doc/libs/1_43_0/doc/html/mpi/getting_started.html#mpi.c..., but the problem is shown below: C:\boost_1_43_0>bjam --with-mpi --debug-configuration notice: found boost-build.jam at C:/boost_1_43_0/boost-build.jam notice: loading Boost.Build from C:/boost_1_43_0/tools/build/v2 notice: Searching C:\WINDOWS C:\Documents and Settings\user_a C:\Documents and S ettings\user_a C:\boost_1_43_0\tools/build/v2 C:/boost_1_43_0/tools/build/v2/ker nel C:/boost_1_43_0/tools/build/v2/util C:/boost_1_43_0/tools/build/v2/build C:/ boost_1_43_0/tools/build/v2/tools C:/boost_1_43_0/tools/build/v2/contrib C:/boos t_1_43_0/tools/build/v2/. for site-config configuration file site-config.jam . notice: Loading site-config configuration file site-config.jam from C:/boost_1_4 3_0/tools/build/v2/site-config.jam . notice: Searching C:\Documents and Settings\user_a C:\Documents and Settings\use r_a C:\boost_1_43_0\tools/build/v2 C:/boost_1_43_0/tools/build/v2/kernel C:/boos t_1_43_0/tools/build/v2/util C:/boost_1_43_0/tools/build/v2/build C:/boost_1_43_ 0/tools/build/v2/tools C:/boost_1_43_0/tools/build/v2/contrib C:/boost_1_43_0/to ols/build/v2/. for user-config configuration file user-config.jam . notice: Loading user-config configuration file user-config.jam from C:/Documents and Settings/user_a/user-config.jam . ===============MPI Auto-configuration=============== Did not find Microsoft Compute Cluster Pack in C:\Program Files\Microsoft Comput e Cluster Pack. warning: toolset mpi initialization: can not find tool mpic++ warning: initialized from C:/boost_1_43_0/tools/build/v2/build\project.jam:881 The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. MPI auto-detection failed: unknown wrapper compiler mpic++ Please report this error to the Boost mailing list: http://www.boost.org You will need to manually configure MPI support. warning: toolset mpi initialization: can not find tool mpirun warning: initialized from C:/boost_1_43_0/tools/build/v2/build\project.jam:881 MPI launcher: mpirun -np ... (1) I can see that bjam cannot find mpic++ and also, bjam displayed "The system cannot find the path specified.", do you know what paths are bjam referring to? Also, if I have mpic++, where should I put this so that bjam can detect it? (2) I already got myself a Windows IA32 (binary) of MPICH2 and installed. Because it's binary, there is no need to build. In the bin folder, I can see mpiexec.exe, but no mpic++. I am quite lost. I think I am on the wrong track. Normally, where can we acquire mpic++? Shouldn't it be distributed along with this MPI implementation as well?