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error when running ./real.exe


New member
Hi all,
I am having the following error when I try to run ./real.exe.

starting wrf task 0 of 1
Fatal error in PMPI_Comm_rank: Invalid communicator, error stack:
PMPI_Comm_rank(122): MPI_Comm_rank(comm=0x0, rank=0x7fffffff9ad8) failed
PMPI_Comm_rank(75).: Invalid communicator
[unset]: write_line error; fd=-1 buf=:cmd=abort exitcode=470378501
system msg for write_line failure: Bad file descriptor
I previously used the same ERA5 dataset to run WRF test simulations and did not have any errors. Not really sure why this error appeared.

I attach my namelist.input file. The error file just produces the error shown above.


  • namelist.input
    5.3 KB · Views: 5
Would you please tell what version of WRF you are running?
How did you build WRF and run REAL?
What is your forcing data (the data you ungrib)?
All look fine to me. I don't see any issue in your namelist.input.
If you run this same case using GFS as input, can it run successfully? if so, at least it can tell us that something is wrong in the data. Please try and keep me updated about the progress.
Hi Ming,
I finally figure out what was the issue. It was related to the HPC I am using. Once the system administrator told me which modules to use with some upgrades it all worked.