[mpich-discuss] mpich2 installation problem

[Dave Goodell]

On Jul 19, 2010, at 7:48 PM CDT, Ann Irvine wrote:

> I further think there is a problem with the MPI installation because
> upon installing mpi4py, I am having problems importing MPI in a python
> script. There, I receive the error in 3 (below).
[...]
> ***************3****************
>  File "demo/helloworld.py", line 6, in <module>
>    from mpi4py import MPI
> ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mpi4py-1.2.1-py2.7-macosx-10.5-fat3.egg/mpi4py/MPI.so,
> 2): Symbol not found: _MPI_Dist_graph_create
>  Referenced from:
> /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mpi4py-1.2.1-py2.7-macosx-10.5-fat3.egg/mpi4py/MPI.so
>  Expected in: flat namespace
> in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mpi4py-1.2.1-py2.7-macosx-10.5-fat3.egg/mpi4py/MPI.so

I'm not sure what is causing this issue.  I would contact the mpi4py developers and see if they have any suggestions.  It's some sort of dynamic linking issue, but it's hard to say from this output whether it's on the python side or the MPICH2 side of the equation.

-Dave