i compiled with absolute path in case:<div><div>fcluster@agua:~$ /opt/openmpi-1.4.2/bin/mpicc testMPI/hello.c -o testMPI/hola</div><div>fcluster@agua:~$ mpirun --hostfile myhostfile -np 5 testMPI/hola</div><div>[agua:03547] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_ofud: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)</div>

<div>[agua:03547] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_openib: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)</div><div>[agua:03548] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_ofud: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)</div>

<div>[agua:03548] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_openib: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)</div><div>[agua:03549] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_ofud: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)</div>

<div>[agua:03549] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_openib: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)</div><div>[agua:03550] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_ofud: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)</div>

<div>[agua:03550] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_openib: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)</div><div>[agua:03551] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_ofud: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)</div>

<div>[agua:03551] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_openib: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)</div><div>--------------------------------------------------------------------------</div>

<div>mpirun noticed that process rank 4 with PID 3551 on node agua exited on signal 11 (Segmentation fault).</div><div>--------------------------------------------------------------------------</div><div><br></div><div>and it segfaulted. the machine stoped and threw many errors on its screen, cannot copy them because they didnt show in ssh.</div>

<div><br></div><br><div class="gmail_quote">On Tue, Jul 27, 2010 at 7:07 PM, Cristobal Navarro <span dir="ltr">&lt;<a href="mailto:axischire@gmail.com">axischire@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

Thanks Gus,<div><br></div><div>but i already had the paths</div><div><br></div><div><div>fcluster@agua:~$ echo $PATH</div><div>/opt/openmpi-1.4.2/bin:/opt/cfc/sge/bin/lx24-amd64:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games</div>


<div>fcluster@agua:~$ echo $LD_LIBRARY_PATH</div><div>/opt/openmpi-1.4.2/lib:</div><div>fcluster@agua:~$ </div></div><div><br></div><div>even weird, errors come sometimes from the master node (agua)</div><div><div></div>

<div class="h5"><div><br><br><div class="gmail_quote">
On Tue, Jul 27, 2010 at 6:59 PM, Gus Correa <span dir="ltr">&lt;<a href="mailto:gus@ldeo.columbia.edu" target="_blank">gus@ldeo.columbia.edu</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">


Hi Cristobal<br>
<br>
Try using the --prefix option of mpiexec.<br>
&quot;man mpiexec&quot; is your friend!<br>
<br>
Alternatively, append the OpenMPI directories to your<br>
PATH *and* LD_LIBRARY_PATH on your .bashrc/.csrhc file<br>
See this FAQ:<br>
<a href="http://www.open-mpi.org/faq/?category=running#adding-ompi-to-path" target="_blank">http://www.open-mpi.org/faq/?category=running#adding-ompi-to-path</a><br>
<br>
I hope it helps,<br>
Gus Correa<br>
<br>
Cristobal Navarro wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div></div><div>
Hi, <br>
Even when executing a hello world openmpi, i get this error, which is then ignored.<br>
fcluster@fuego:~$ mpirun --hostfile myhostfile -np 5 testMPI/hola [agua:02357] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_ofud: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)<br>



[agua:02354] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_ofud: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)<br>
[agua:02356] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_ofud: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)<br>
[agua:02358] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_ofud: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)<br>
[agua:02355] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_ofud: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)<br>
[agua:02358] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_openib: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)<br>
[agua:02355] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_openib: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)<br>
[agua:02354] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_openib: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)<br>
[agua:02356] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_openib: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)<br>
[agua:02357] mca: base: component_find: unable to open /opt/openmpi-1.4.2/lib/openmpi/mca_btl_openib: perhaps a missing symbol, or compiled for a different version of Open MPI? (ignored)<br>
Process 3 on agua out of 5<br>
Process 4 on agua out of 5<br>
Process 1 on agua out of 5<br>
Process 2 on agua out of 5<br>
Process 0 on agua out of 5<br>
<br>
<br>
/opt/openmpi-1.4.2/ is shared through NFS.<br>
<br>
master node did had an older openmpi version before installing 1.4.2, but i removed them all with<br>
sudo apt-get --purge remove libopenmpi1 libopenmpi-dev openmpi-bin openmpi-dev openmpi-common<br>
i checked for /usr/lib64/openmpi   and for  /usr/lib/openmpi   and deleted them.<br>
<br>
however, when compiling again i keep getting this error,<br>
something must be remaining from the older version of openmpi, but i really dont know where that remaining could be.<br>
any help, welcome<br>
 <br>
<br></div></div>
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