Hi Neeraj singh, To clarify, does this error only happen when you try to use the profiler tool? -- Hui Zhou From: Neeraj singh via discuss <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Friday, October 9, 2020 at 8:41 AM To: "[email protected]" <[email protected]> Cc: Neeraj singh <[email protected]> Subject: [mpich-discuss] Regarding issue with MPICH 3.2 I am using the MAQAO profiler tool to collect data based on sampling. While launching an application for multinode some issues I'm facing. Kindly check the attached problem lines and clarify the same. Thanks & Regards Problem lines: [mpiexec@gpu7] HYDU_sock_write (utils/sock/sock.c:294): write error (Bad file descriptor) [mpiexec@gpu7] HYD_pmcd_pmiserv_send_signal (pm/pmiserv/pmiserv_cb.c:177): unable to write data to proxy [mpiexec@gpu7] ui_cmd_cb (pm/pmiserv/pmiserv_pmci.c:79): unable to send signal downstream [mpiexec@gpu7] HYDT_dmxu_poll_wait_for_event (tools/demux/demux_poll.c:76): callback returned error status [mpiexec@gpu7] HYD_pmci_wait_for_completion (pm/pmiserv/pmiserv_pmci.c:198): error waiting for event [mpiexec@gpu7] main (ui/mpich/mpiexec.c:340): process manager error waiting for completion