[MITgcm-support] Fatal error in PMPI_Comm_rank: Invalid communicator, error stack

[Ali Ramadhan]

Hi Srinivas,

I think I had a similar problem a few weeks ago. I notice you are correctly
using the " linux_amd64_ifort+impi" build option which should compile using
the mpiifort and mpiicc compilers, but then use mpirun from OpenMPI.

What worked for me was using the mpirun provided by the intel compiler
(impi) which you presumably have loaded for compilation. If you "module
unload openmpi" do you still have an mpirun in your PATH? You can run "which
mpirun" to check
 where it is located, hopefully from the Intel compiler.

I should also mention that Intel's mpirun and mpiexec are slightly
different so if mpirun still does not work, maybe try mpiexec.

Let us know if this helps or not!

Cheers,
Ali

On Thu, Sep 6, 2018 at 6:23 AM Srinivasu U <srinivasu.u at incois.gov.in>
wrote:

> Dear MITgcm support,
>
> I am trying to run a tutorial example of tutorial_barotropic_gyre
>
> I built it as follows
>
> cd verification/tutorial_barotropic_gyre/build
> module unload netcdf/4.2.1
> module load netcdf/3.6.3_new
> module load openmpi/1.8.4
> export NETCDF_ROOT=”/gpfs1/home/Libs/INTEL/NETCDF-3.6.3_new”
> export MPI_INC_DIR="/gpfs1/home/Libs/INTEL/OPENMPI/openmpi-1.8.4/include”
> ../../../tools/genmake2 -enable=mnc -mods ../code -optfile
> ../../../tools/build_options/linux_amd64_ifort+impi -mpi
> make depend
> make
>
> cd ../run
> ln -s ../input/* .
> cp ../build/mitgcmuv .
>
> But while running the model as follows
> mpirun -np 4 ./mitgcmuv
> I get the following error
>
> Fatal error in PMPI_Comm_rank: Invalid communicator, error stack:
> PMPI_Comm_rank(121): MPI_Comm_rank(comm=0x0, rank=0xeea1a4) failed
> PMPI_Comm_rank(73).: Invalid communicator
>
> Thanks in Advance.
>
> Srinivasu U
> Scientist-C, CSG,
> Indian National Center for Ocean Information Services(INCOIS),
> Hyderabad-500090.
> Telephone:04023886146
> Mobile:9032325438.
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support
>
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