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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText>To whom it may concern:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>The MPICH2 version 1.3.2p1 installation seemed successful. I can compile codes using the<o:p></o:p></p><p class=MsoPlainText> mpif90 compiler. I can run the executable, let's say a.exe, by typing in the command line ./a.exe. In the execution, the MPI functions seem to work well. However, when I try to execute mpiexec, I get the following error<o:p></o:p></p><p class=MsoPlainText> message:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> $mpiexec -n 1 ./a.exe<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> [mpiexec@IT-0089] control_cb (./pm/pmiserv/pmiserv_cb.c:150): assert<o:p></o:p></p><p class=MsoPlainText> (!closed) failed<o:p></o:p></p><p class=MsoPlainText> [mpiexec@IT-0089] HYDT_dmxu_poll_wait_for_event (./tools/demux_poll.c:77):<o:p></o:p></p><p class=MsoPlainText> callback returned error status<o:p></o:p></p><p class=MsoPlainText> [mpiexec@IT-0089] HYD_pmci_wait_for_completion<o:p></o:p></p><p class=MsoPlainText> (./pm/pmiserv/pmiserv_pmci.c:206): error waiting for event<o:p></o:p></p><p class=MsoPlainText> [mpiexec@IT-0089] main (./ui/mpich/mpiexec.c:404): process manager error waiting for completion<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Exactly the same error message is obtained trying with two processors “mpiexec –n 2 ./a.exe”<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> Any help would very much appreciated. Thank you very much<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>