<div dir="ltr">Hi, that sounds like an issue with your installation of MPI (Message Passing Interface), rather than FLASH.<div><br></div><div>An invalid communicator implies that the network interfaces are not being recognized properly by MPI.</div><div><br></div><div>Good luck!</div><div><br></div><div>Scott</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Feb 28, 2023 at 8:39 PM 伤心人已走远 <<a href="mailto:748749245w@gmail.com">748749245w@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">Hi, I am trying to run flash4: ./flash4, and then failed. <div><br></div><div>ERROR:</div><div><div>Abort(604591621) on node 0 (rank 0 in comm 0): Fatal error in MPII_Comm_set_attr: Invalid communicator, error stack:</div><div>MPII_Comm_set_attr(90): MPI_Comm_set_attr(comm=0x52e85e40, keyval=0xa4400001, attribute_val=(nil)) failed</div><div>MPII_Comm_set_attr(47): Invalid communicator</div></div><div><br></div><div>How could I deal with this?</div></div></div>
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