I have posted the following question on stackoverflow <http://stackoverflow.com/questions/24940918/error-using-rmpi-on-osx-moutain-lion> (but i didn't get any feedback). I am posting it here, hoping that a more R-focued user group might be able to help me out.. Thank you ---------------------------------------------------------------------------------- I am trying to install Rmpi on OSX moutain lion. I have installed open-mpi, and i have installed Rmpi (both i think successfully). I can load the R-package using library(Rmpi), however, whenever i try to run the commands: mpi.spawn.Rslaves(nslaves=2) I get an error FORKING HNP: orted --hnp --set-sid --report-uri 15 --singleton-died-pipe 16 -mca state_novm_select 1 -mca ess_base_jobid 3017342976 and i get an error log file in my home directory: which state: Warning messages: 1: In library(Rmpi, logical.return = TRUE) : there is no package called ‘Rmpi’ 2: Rmpi cannot be loaded I have tried uninstall/re-install open-mpi using Brew (following the following instruction <http://www.stats.uwo.ca/faculty/yu/Rmpi/>) and downloading/installing open-mpi from their website <http://www.open-mpi.org/software/ompi/v1.8/>. I am using R version 3.1.1 on Platform: x86_64-apple-darwin10.8.0 (64-bit)and using open-mpi 1.8.1 Has anyone experience this error before and/or know how to resolves it? Thank you very much in advance -- "If we take eternity to mean not infinite temporal duration but timelessness, then eternal life belongs to those who live in the present." ― Ludwig Wittgenstein [[alternative HTML version deleted]]