Error when using mpirun with a shell script

Question

When I run

mpirun -np 4 mpi_script.sh

I get the error

Open MPI tried to fork a new process via the "execve" system call but failed.
...
Error:             Exec format error

despite the fact that I can run the script with ./mpi_script.sh

JobJob · Accepted Answer · 2018-10-03 07:51:59Z

2

In my case the problem was I didn't have a shebang.

Adding #!/usr/bin/env bash to the top of my script fixed it:

#!/usr/bin/env bash

# rest of script
# ...

N.b. be sure that the file has execute permissions:

chmod +x mpi_script.sh

answered Oct 3, 2018 at 7:51

JobJob

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