export LD_LIBRARY_PATH= [location of library] leave out the :$LD_LIBRARY_PATH 

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From: users-bounces@open-mpi.org [users-bounces@open-mpi.org] on behalf of seshendra seshu [seshu199@gmail.com]

Sent: Wednesday, April 25, 2012 10:43 AM
To: Open MPI Users
Subject: Re: [OMPI users] regarding the problem occurred while running anmpi programs

Hi
I have exported the library files as below

[master@ip-10-80-106-70 ~]$ export LD_LIBRARY_PATH=/usr/local/openmpi-1.4.5/lib:$LD_LIBRARY_PATH                                                                       
[master@ip-10-80-106-70 ~]$ mpirun --prefix /usr/local/openmpi-1.4.5 -n 1 --hostfile hostfile out
out: error while loading shared libraries: libmpi_cxx.so.0: cannot open shared object file: No such file or directory
[master@ip-10-80-106-70 ~]$ mpirun --prefix /usr/local/lib/ -n 1 --hostfile hostfile out                                                                               
out: error while loading shared libraries: libmpi_cxx.so.0: cannot open shared object file: No such file or directory

But still iam getting the same error.

On Wed, Apr 25, 2012 at 5:36 PM, Jeff Squyres (jsquyres) <jsquyres@cisco.com> wrote:

See the FAQ item I cited. 

Sent from my phone. No type good. 

On Apr 25, 2012, at 11:24 AM, "seshendra seshu" <seshu199@gmail.com> wrote:

Hi
now i have created an used and tried to run the program but i got the following error

[master@ip-10-80-106-70 ~]$ mpirun -n 1 --hostfile hostfile out                                                                                                        
out: error while loading shared libraries: libmpi_cxx.so.0: cannot open shared object file: No such file or directory


thanking you

On Wed, Apr 25, 2012 at 5:12 PM, Jeff Squyres <jsquyres@cisco.com> wrote:

On Apr 25, 2012, at 11:06 AM, seshendra seshu wrote:

> so should i need to create an user and run the mpi program. or how can i run in cluster

It is a "best practice" to not run real applications as root (e.g., MPI applications).  Create a non-privlidged user to run your applications.

Then be sure to set your LD_LIBRARY_PATH if you installed Open MPI into a non-system-default location.  See this FAQ item:

   http://www.open-mpi.org/faq/?category=running#adding-ompi-to-path

--
Jeff Squyres
jsquyres@cisco.com
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