I've solved the same weird error on Linux, but have not tried Windows yet. The error recurs on Linux system, when I firstly use mpich on my Linux, the program works fine, then I uninstalled it and switched to your open-mpi, the error came out without warning, and I tried to change the compiler to mpic++ other than g++, the error remains. So I doubt if the Boost.MPI is compatible with current MPI system, I recompiled the Boost.MPI library and substituted the old ones, the code with Boost library came back to work. So I guess the old compiled Boost library depends on other library like mpich, so it can't work with current open-mpi because they are incompatible, however, I'm still confused why simple code (In the last mail I sent to you) which does not depend on Boost library(I never used mpich on Windows before), can not work.

2011/8/9 Shiqing Fan <fan@hlrs.de>

Hi,

The code works for me under MinGW console with the pre-compiled installer. Could you try "which mpicc" to ensure that the correct Open MPI commands are in path?

For building Open MPI by your self with CMake, you have to configure it in the GUI and then generate the sln files by pressing the generate button. I don't recommend to use the other two means, they haven't been tested for some while.

Regards,
Shiqing
On 2011-08-09 3:48 AM, renyong.yang wrote:
hi,
the following code:

int main(int argc, char **argv)

{
int procnum;

/* Initialize MPI */

MPI_Init(&argc, &argv);

/* Find out this processor number */

MPI_Comm_rank(MPI_COMM_WORLD, &procnum);

/* Find out the number of processors */

std::cout << "I'm process: " << procnum << std::endl;

MPI_Finalize();

return 0;

}

also goes with the same rank "0" error, I think if there's something wrong with the auxiliary program "mpirun" ?

BTW, I tried all the 3 means on your http://svn.open-mpi.org/svn/ompi/trunk/README.WINDOWS.txt guideline but none worked to compile my own dll for http://www.open-mpi.org/software/ompi/v1.4/downloads/openmpi-1.4.3.tar.bz2, the first approach failed because I found no .sln file in the distributed tarballs after configuring with cmake, the second mean I can not use is the lacking of ompi-static.tgz file, the 3rd solution I tried does not work neither, because I don't know what the ash.exe shell interpreter you are actually pointing to, so I'd be much appreciated if you can tell me the a working approach. Thanks very much.

2011/8/9 Shiqing Fan <fan@hlrs.de>
Hi,

I've never tried this Boost.MPI with Open MPI on Windows. Does it work without the Boost.MPI library? Did you run your test under MinGW?

Regards,
Shiqing

On 2011-08-08 5:31 PM, renyong.yang wrote:
Run time environment of mine is Windows 7, with the unstable OpenMPI_v1.5.3-2_win32.exe release for Windows, together with Microsoft Compute Cluster Pack. Additionally I'm using Boost.MPI library v1.47 compiled by mingw, I write those following codes:

int main(int argc, char **argv)

{

mpi::environment env(argc, argv); // Boost.MPI class

boost::mpi::communicator worldCom; // Boost.MPI class

std::cout << "rank():" << worldCom.rank() << std::endl;

worldCom.barrier();

return 0;

}

and successfully compiled and linked with your library as "a.exe" by mingw, however, if I run it:

>mpirun -np 4 a.exe

the command will create 4 process with the same rank "0", I wonder if it's the bug of your unstable release for windows?

BTW, can you publish the Visual studio project to the subversion? Thanks very much.
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-- --------------------------------------------------------------- Shiqing Fan High Performance Computing Center Stuttgart (HLRS) Tel: ++49(0)711-685-87234 Nobelstrasse 19 Fax: ++49(0)711-685-65832 70569 Stuttgart http://www.hlrs.de/organization/people/shiqing-fan/ email: fan@hlrs.de
-- 
---------------------------------------------------------------
Shiqing Fan
High Performance Computing Center Stuttgart (HLRS)
Tel: ++49(0)711-685-87234      Nobelstrasse 19
Fax: ++49(0)711-685-65832      70569 Stuttgart
http://www.hlrs.de/organization/people/shiqing-fan/
email: fan@hlrs.de