On Fri, Nov 14, 2025 at 09:50:29PM +0100, J.L.G. Pallero wrote: > Package: openmpi-bin > Version: 5.0.9-1 > Severity: important > X-Debbugs-Cc: [email protected] > > Dear Maintainer, > > Trying to execute a MPI program with mpirun that works a few days ago, it > still works, but I obtain some strange messages I can't interpret. The > messages are: > > [geo-w540][[64946,1],2][../../../../../../opal/mca/btl/tcp/btl_tcp_proc.c:266:mca_btl_tcp_proc_create_interface_graph] > > [geo-w540][[64946,1],1][../../../../../../opal/mca/btl/tcp/btl_tcp_proc.c:266:mca_btl_tcp_proc_create_interface_graph] > Unable to find reachable pairing between local and remote interfaces
Hello. I had a similar problem some time ago, which I forwarded here: https://github.com/hypre-space/hypre/issues/1194 Can you try this to see if the messages (which afaik are just warnings and harmless) go away? export OMPI_MCA_btl_tcp_if_include=lo Thanks.
