I compile with : mpicc pingpong.c -o pingpong
And when i try to launch it with : mpiexec -n 2 pingpong
I have this :
Je suis 0/2 on xpscp117892.tasfr.thales
Je suis 1/2 on xpscp117892.tasfr.thales
[xpscp117892.tasfr.thales:08216] mca_btl_sm_send: write fifo failed:
errno=9
Tour 4130968 : Envoye 'i' vers 1
Tour 4716696 : Recu 'i' de 0

And I don't understant why I have an error "mca_btl........"
PS: I'm working with only one PC

The error message is saying that something failed in the shared memory transport. Could you please send the output of ompi_info? It would also be useful to know what operating system and compiler/ compiler version you used when compiling Open MPI.

Thanks,

Brian


--
  Brian Barrett
  Open MPI developer
  http://www.open-mpi.org/


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