MPI.File.Open error (src/mpi4py.MPI.c:89639)

[MPI4py_Learner]

Hello,

I am currently learning MPI programmming with mpi4py Python package. I was trying to write simple script that involves file opening, reading, and writing. As a starter, I implemented MPI.File.Open() Method to read a file with the following codes: 

------------------------------------------------------------------------
from mpi4py import MPI

comm = MPI.COMM_WORLD
file = '/path/usr/test.txt'
myfile=MPI.File.Open(comm,file,amode=MPI.MODE_RDONLY)

myfile.Close()
------------------------------------------------------------------------------------------------------------

When running the code with with mpiexec , the following error messages was displayed: 

------------------------------------------------------------------------
 mpi_file_read=MPI.File.Open(comm,file,amode=MPI.MODE_RDONLY)
  File "File.pyx", line 67, in mpi4py.MPI.File.Open (src/mpi4py.MPI.c:89639)
mpi4py.MPI.Exception: MPI_ERR_OTHER: known error not in list
------------------------------------------------------------------------

Can anyone help me figure out what was the issue ? 

Thank you very much. 

[Aron Ahmadia]

Almost certainly either a path or a permissions issue.  Are you sure the file exists and you have permission to open it?

A

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