Hi,<br><br>I have installed MPICH as per the instruction mentioned in README file for using it in gromacs. After executing the command :<br><br>mdrun_mpi mdrun -np 4 -s prefix_.tpr -multi 4 -replex 1000<br><br clear="all">
I am getting the following error :-<br><br>Fatal error:<br>The number of nodes (1) is not a multiple of the number of simulations (4)<br><br><br>I asked the for help in gromacs user list and they replied that :<br><br><tt>If mdrun is reporting the number of nodes is 1, then you have not
</tt><tt>configured your MPI environment correctly so that it knows how many
</tt><tt>processors you have available. You will need to solve this by reading
</tt><tt>your MPI documentation.
</tt><pre style="margin:0em"><br>I have also checked my installation by running the following command on MPICH :-<br><br>[root@BHARATPC mpich2-1.4.1p1]# mpiexec -n 4 ./examples/cpi<br>Process 0 of 4 is on BHARATPC<br>Process 1 of 4 is on BHARATPC<br>
Process 2 of 4 is on BHARATPC<br>Process 3 of 4 is on BHARATPC<br>pi is approximately 3.1415926544231239, Error is 0.0000000008333307<br>wall clock time = 0.000447<br><br>I am having 4 processors in my PC. I want to know how to configure MPI to recognize these 4 processors, so that I can use it in gromacs . Please help in this regard<br>
<br><br><br><br></pre><br><br>-- <br>Bharat<br>Ph.D. Candidate<br>Room No. : 7202A, 2nd Floor<br>Biomolecular Engineering Laboratory<br>Division of Chemical Engineering and Polymer Science<br>Pusan National University<br>
Busan -609735<br>South Korea<br>Lab phone no. - +82-51-510-3680, +82-51-583-8343<div>Mobile no. - 010-5818-3680<br>E-mail : <a href="mailto:monu46010@yahoo.com" target="_blank">monu46010@yahoo.com</a></div><br>