Hi, I am trying to solve a linear system of equations on a 4xIBM HS22 Blade setup (24GB+two 4 cores Intel Xeon). I am facing the following error during my computation, does anyone know what the problem is? ------------------------------------------------------------------------------------------------------------- INTERNAL ERROR: Invalid error class (71) encountered while returning from MPI_Recv. Please file a bug report. [proxy:0:[email protected]] HYD_pmcd_pmip_control_cmd_cb (./pm/pmiserv/pmip_cb. c:928): assert (!closed) failed [proxy:0:[email protected]] HYDT_dmxu_poll_wait_for_event (./tools/demux/demux_ poll.c:77): callback returned error status [proxy:0:[email protected]] main (./pm/pmiserv/pmip.c:226): demux engine error waiting for event [proxy:0:[email protected]] HYD_pmcd_pmip_control_cmd_cb (./pm/pmiserv/pmip_cb. c:928): assert (!closed) failed [proxy:0:[email protected]] HYDT_dmxu_poll_wait_for_event (./tools/demux/demux_ poll.c:77): callback returned error status [proxy:0:[email protected]] main (./pm/pmiserv/pmip.c:226): demux engine error waiting for event [[email protected]] HYDT_bscu_wait_for_completion (./tools/bootstrap/util s/bscu_wait.c:70): one of the processes terminated badly; aborting [[email protected]] HYDT_bsci_wait_for_completion (./tools/bootstrap/src/ bsci_wait.c:23): launcher returned error waiting for completion [[email protected]] HYD_pmci_wait_for_completion (./pm/pmiserv/pmiserv_pm ci.c:191): launcher returned error waiting for completion [[email protected]] main (./ui/mpich/mpiexec.c:405): process manager erro r waiting for completion ------------------------------------------------------------------------------------------------------------- Regards, -- Nitel