Francisco, this is fine, i just wanted to double check you were not using a machinefile the wrong way. your initial request was :

If the script that runs the model is scheduled with cron it just starts processes on the main node but not in the rest of the cluster nodes. and from what i can read, you are not using any machinefile. how do you expect your job run on all the cluster nodes if you do not have a machinefile ?

can you run $ruta_mpi/mpirun -n 40 hostname both from shell and crontab which nodes are used in both cases ? by the way, can you ssh passwordless on all the nodes from where the cron is ran ? passwordless means you do not need to enter any password and/or passphrase nor "save" your passphase via ssh-agent. and could you confirm /home/meteo/RAMS/SCRIPTS/RAMS_operatiu.bash < /dev/null works fine from the shell ? Cheers, Gilles On 2014/06/12 21:37, Francisco Pastor wrote:

RAMSIN.operatiu is not machinefile. It is a configuration file read by ./rams60.

May this be causing a conflict? Does mpirun try to read RAMSIN.operatiu?