While possible, it is highly unlikely that your desktop version is going to be binary compatible with your cluster...
On Jul 24, 2020, at 9:55 AM, Lana Deere via users <users@lists.open-mpi.org <mailto:users@lists.open-mpi.org> > wrote: I have open-mpi 4.0.4 installed on my desktop and my small test programs are working. I would like to migrate the open-mpi to a cluster and run a larger program there. When moved, the open-mpi installation is in a different pathname than it was on my desktop and it doesn't seem to work any longer. I can make the libraries visible via LD_LIBRARY_PATH but this seems insufficient. Is there an environment variable which can be used to tell the open-mpi where it is installed? Is it mandatory to actually compile the release in the ultimate destination on each system where it will be used? Thanks. .. Lana (lana.de...@gmail.com <mailto:lana.de...@gmail.com> )