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POMPI_Send and MPI_Recv
 

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    <p>I installed MPICH2 to two computers ( 'suaddell' and 'o01' ) with Windows 7 operating system. I use VC++ Express Edition 2008 for compiling. Everything is good. I can run simple "Hello World" MPI applications in both hosts. But when I try to run simple MPI_Send and MPI_Recv applications, the program does not end, it hangs. I can see it runs without end on my computer and remote host by using Resource Monitor. If I press "Ctrl+C", it is ended and it displays below message, it pretends that every things work fine.</p> <hr> <h2>mpiexec command and the message after Ctrl+C</h2> <pre><code>C:\&gt;mpiexec.exe -hosts 2 suaddell o01 -noprompt mesajlasma.exe mpiexec aborting job... Received Message :Hello World _OK!_ job aborted: rank: node: exit code[: error message] 0: suaddell: 123: mpiexec aborting job 1: o01: 123 </code></pre> <hr> <h2>the code is here:</h2> <pre><code>#include "stdafx.h" #include "string.h" #include "mpi.h" int main(int argc, char* argv[]) { int nTasks, rank; char mesaj[20]; MPI_Status status; MPI_Init(&amp;argc,&amp;argv); MPI_Comm_size(MPI_COMM_WORLD,&amp;nTasks); MPI_Comm_rank(MPI_COMM_WORLD,&amp;rank); if(rank == 1) { strcpy_s(mesaj, "Hello World"); if (MPI_SUCCESS==MPI_Send(mesaj, strlen(mesaj)+1, MPI_CHAR, 0, 7, MPI_COMM_WORLD)) printf("_OK!_\n"); } if(rank == 0) { MPI_Recv(mesaj, 20, MPI_CHAR, 1, 7, MPI_COMM_WORLD, &amp;status); printf("Received Message :%s\n", mesaj); } MPI_Finalize(); return 0; } </code></pre> <hr> <h2>When the program runs by using "-verbose" , i can see that the system is waiting here untill pressing "Ctrl+C":</h2> <p><em>. (There are a lot of lines here) .</em></p> <pre><code>......command written to left: "cmd=result src=0 dest=2 tag=5 cmd_tag=0 ctx_key= 0 result=SUCCESS " ......\smpd_free_command .......\smpd_init_command ......./smpd_init_command ....../smpd_free_command ...../smpd_state_writing_cmd ..../smpd_handle_op_write ....sock_waiting for the next event. ....\SMPDU_Sock_wait </code></pre> <p><em>(this is the last line till I press "Ctrl+C")</em></p> <p>How can I fix this problem.</p> <p>Thanks in advance</p>
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    1. COAre you sure for the command? In Linux, the command is mpirun.
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    2. CO@Dimitri: mpiexec and mpirun are the same, in OpenMPI both are pointing to the same file orterun.
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