Hi, Was wondering if you guys had any insight in to this assert failure. We are seeing this intermittently. The mpiexec command we are executing is similar to the one pasted below: mpiexec -n 1 <exec1> : -n 1 <exec2> : -n 1 <exec3> : -n 1 <exec4> : -n 1 <exec5> : -n 1 <exec6> : -n 1 <exec7> Crash that we are seeing: [proxy:0:0@gretel] HYD_pmcd_pmip_control_cmd_cb (</PATH/TO>/src/pm/hydra/pm/pmiserv/pmip_cb.c:934): assert (!closed) failed [proxy:0:0@gretel] HYDT_dmxu_poll_wait_for_event (</PATH/TO>/src/mpich2-1.5/src/pm/hydra/tools/demux/demux_poll.c:77): callback returned error status [proxy:0:0@gretel] main (</PATH/TO>/src/mpich2-1.5/src/pm/hydra/pm/pmiserv/pmip.c:210): demux engine error waiting for event [mpiexec@gretel] control_cb (</PATH/TO>/src/mpich2-1.5/src/pm/hydra/pm/pmiserv/pmiserv_cb.c:201): assert (!closed) failed [mpiexec@gretel] HYDT_dmxu_poll_wait_for_event (</PATH/TO>/src/mpich2-1.5/src/pm/hydra/tools/demux/demux_poll.c:77): callback returned error status [mpiexec@gretel] HYD_pmci_wait_for_completion (</PATH/TO>/src/mpich2-1.5/src/pm/hydra/pm/pmiserv/pmiserv_pmci.c:196): error waiting for event [mpiexec@gretel] main (</PATH/TO>/src/mpich2-1.5/src/pm/hydra/ui/mpich/mpiexec.c:325): process manager error waiting for completion No such file or directory. (errno = ENOENT) Command exited with non-zero status 20 Thanks, Vasu