Hi,<br>I am trying to run the example applications in OpenMPI using the command &quot;mpirun --prefix /usr/local/  --mca btl_openib_cpc_include rdmacm -np 4 -H &lt;IP&gt; hello_c&quot;<br><br>But I am getting the below warning<br>
&quot;WARNING: No preset parameters were found for the device that Open MPI detected:&quot;<br><br>Also at the end (just before the above command returns), I see messages like <br>&quot;[localhost.localdomain:28537] 3 more processes have sent help message help-mpi-btl-openib.txt / no device params found<br>
[localhost.localdomain:28537] Set MCA parameter &quot;orte_base_help_aggregate&quot; to 0 to see all help / error messages&quot;<br><br>Am I missing anything with the command that I used (OR) can we ignore these messages ? Please suggest me.<br>
<br>Thanks &amp; Regards,<br>Ramu<br>