Hi All, I have mpich-3.1.2 and hydra-3.1.2 installed in the /opt directory on the cluster which I run a regional climate model on. Now ,I got a error message listed here in red.Anyone have any idea about this? Thanks a lot!Any help is appreciated! Assertion failed in file src/mpi/datatype/unpack.c at line 60: FALSE memcpy argument memory ranges overlap, dst_=0x2b1e91fd2010 src_=0x2b1e91fd2024 len_=496128 internal ABORT - process 0 [proxy:0:1@C006] HYD_pmcd_pmip_control_cmd_cb (pm/pmiserv/pmip_cb.c:885): assert (!closed) failed [proxy:0:1@C006] HYDT_dmxu_poll_wait_for_event (tools/demux/demux_poll.c:76): callback returned error status [proxy:0:1@C006] main (pm/pmiserv/pmip.c:206): demux engine error waiting for event [mpiexec@C001] HYDT_bscu_wait_for_completion (tools/bootstrap/utils/bscu_wait.c:75): one of the processes terminated badly; aborting [mpiexec@C001] HYDT_bsci_wait_for_completion (tools/bootstrap/src/bsci_wait.c:23): launcher returned error waiting for completion [mpiexec@C001] HYD_pmci_wait_for_completion (pm/pmiserv/pmiserv_pmci.c:218): launcher returned error waiting for completion Best, Chun