Did the version you are running get installed in /usr? Sounds like you are picking up a different version when running a command - i.e., that your PATH is finding a different installation than the one in /usr. On Oct 26, 2011, at 3:11 AM, Patrick Begou wrote:I need to change system wide how OpenMPI launch the jobs on the nodes of my cluster. Setting: export OMPI_MCA_plm_rsh_agent=oarsh works fine but I would like this config to be the default with OpenMPI. I've read several threads (discussions, FAQ) about this but none of the provided solutions seams to work. I have two files: /usr/lib/openmpi/1.4-gcc/etc/openmpi-mca-params.conf /usr/lib64/openmpi/1.4-gcc/etc/openmpi-mca-params.conf In these files I've set various flavor of the syntax (only one at a time, and the same in each file of course!): test 1) plm_rsh_agent = oarsh test 2) pls_rsh_agent = oarsh test 3) orte_rsh_agent = oarsh But each time when I run "ompi_info --param plm rsh" I get: MCA plm: parameter "plm_rsh_agent" (current value: "ssh : rsh", data source: default value, synonyms: pls_rsh_agent) The command used to launch executables on remote nodes (typically either "ssh" or "rsh") With the exported variable it works fine. Any suggestion ? The rpm package of my linux Rocks Cluster provides: Package: Open MPI root@build-x86-64 Distribution Open MPI: 1.4.3 Open MPI SVN revision: r23834 Open MPI release date: Oct 05, 2010 Thanks Patrick -- =============================================================== | Equipe M.O.S.T. | http://most.hmg.inpg.fr | | Patrick BEGOU | ------------ | | LEGI | mailto:Patrick.Begou@hmg.inpg.fr | | BP 53 X | Tel 04 76 82 51 35 | | 38041 GRENOBLE CEDEX | Fax 04 76 82 52 71 | =============================================================== _______________________________________________ users mailing list users@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users_______________________________________________ users mailing list users@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/users