Using paranrn as python module does not work

[mattions]

Hi,

I'm trying to use the parallel neuron to run my simulation

If I use the binary it works. :

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nrniv -python -mpi mpi_ex.py

If I use neuron as python module it doesn't

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python mpi_exp.py

The code I'm running is the following:

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from mpi4py import MPI
import os
# Removing display to import neuron properly
if os.environ.has_key("DISPLAY"):
    del os.environ['DISPLAY']
from neuron import h
pc = h.ParallelContext()

s = "mpi4py thinks I am %d of %d, NEURON thinks I am %d of %d\n"
cw = MPI.COMM_WORLD
print s % (cw.rank, cw.size, pc.id(), pc.nhost())

pc.done()

Output 1:

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mattioni@ebi-001:sandbox(master)$ bsub -I -n 4 -a openmpi mpirun.lsf -np 4 -mca btl tcp,self nrniv -python -mpi mpi_exp.py
Job <237116> is submitted to default queue <research>.
<<Waiting for dispatch ...>>
<<Starting on ebi-152>>
numprocs=4
NEURON -- Release 7.0 (281:80827e3cd201) 2009-01-16
Duke, Yale, and the BlueBrain Project -- Copyright 1984-2008
See http://www.neuron.yale.edu/credits.html

mpi4py thinks I am 0 of 4, NEURON thinks I am 0 of 4
mpi4py thinks I am 1 of 4, NEURON thinks I am 1 of 4
mpi4py thinks I am 2 of 4, NEURON thinks I am 2 of 4
mpi4py thinks I am 3 of 4, NEURON thinks I am 3 of 4

Output 2:

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mattioni@ebi-001:sandbox(master)$ bsub -I -n 4 -a openmpi mpirun.lsf -np 4 -mca btl tcp,self python mpi_exp.py
Job <237115> is submitted to default queue <research>.
<<Waiting for dispatch ...>>
<<Starting on ebi-108>>

NEURON -- Release 7.0 (281:80827e3cd201) 2009-01-16
Duke, Yale, and the BlueBrain Project -- Copyright 1984-2008
See http://www.neuron.yale.edu/credits.html

mpi4py thinks I am 2 of 4, NEURON thinks I am 0 of 1

mpi4py thinks I am 0 of 4, NEURON thinks I am 0 of 1

mpi4py thinks I am 1 of 4, NEURON thinks I am 0 of 1

mpi4py thinks I am 3 of 4, NEURON thinks I am 0 of 1

It's worth to say that if I run the binary nrniv without the mpi switch I obtain the second output.
What am I missing here?

[hines]

NEURON -- Release 7.0 (281:80827e3cd201) 2009-01-16

Try the latest alpha version
http://www.neuron.yale.edu/ftp/neuron/versions/alpha
There have been a number of changes with regard to figuring out whether or not to
add the -mpi arg when extending.

[mattions]

It works with this one.
Thanks.