Turned out it was the fftw package that was not installed perfectly.

I used the fftw package that came with QE as suggested and all went fine.

Thanks a lot.

From: Jeff Squyres <jsquyres@cisco.com>
To: Open MPI Users <users@open-mpi.org>
Date: Sat, 16 Aug 2008 07:57:58 -0400
Subject: Re: [OMPI users] Segmentation fault (11) Address not mapped (1)
It's not entirely clear that this means that it is a bug in Open MPI -- there's not really enough information here to say where the problem is. All that is clear is that a seg fault is happening somewhere in LAPACK.

FWIW, I don't see MPI in the call stack of the segv at all. This doesn't definitively mean that MPI is not involved, but it does suggest that the bug is elsewhere. You might want to run this under a debugger or examine the generated corefiles to see exactly what the problem was.

On Aug 15, 2008, at 1:03 PM, C.Y. Lee wrote:

All,

I had a similar problem as James described in an earlier message: http://www.open-mpi.org/community/lists/users/2008/07/6204.php
While he was able to recompile openmpi to solve the problem, I had no luck with my RedHat Enterprise 5 system.
Here are two other threads with similar issues regarding openmpi on Ubuntu and OSX which were solved: https://bugs.launchpad.net/ubuntu/+source/binutils/+bug/234837
http://www.somewhereville.com/?cat=55