Sounds like a non-GROMACS problem. I think you should explore configuring OpenMPI correctly, and show you can run an MPI test program successfully.
Mark On Thu, Nov 7, 2013 at 5:51 PM, niloofar niknam <niloofae_nik...@yahoo.com>wrote: > Dear gromacs users > I have installed gromacs 4.6.1 with cmake 2.8.12, fftw3.3.3 and > openmpi-1.6.4 on a single machine with 8 cores(Red Hat Enterprise linux > 6.1) . During openmpi installation ( I used "make -jN") and also in gromacs > installation ( I used "make -j N" command), everything seemed ok but when I > want to use mpirun -np N mdrun I face this error: > > "mpiexec failed: gethostbyname_ex failed for Bioinf2" > (I can run mdrun with just one cpu).Any suggestion would be highly > appreciated. > thanks in advance, > Niloofar > -- > gmx-users mailing list gmx-users@gromacs.org > http://lists.gromacs.org/mailman/listinfo/gmx-users > * Please search the archive at > http://www.gromacs.org/Support/Mailing_Lists/Search before posting! > * Please don't post (un)subscribe requests to the list. Use the > www interface or send it to gmx-users-requ...@gromacs.org. > * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > -- gmx-users mailing list gmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search before posting! * Please don't post (un)subscribe requests to the list. Use the www interface or send it to gmx-users-requ...@gromacs.org. * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists