Maybe this helps: The openmpi-bin.postinst uses update-alternatives --query mpi | grep --silent libmpi
this returns Exit-Code 1 (which is tested one line below. Since "set -e" is set, the scrips breaks here. Workaround is: # Delete old non-multi-arch aware mpi set +e update-alternatives --query mpi | grep --silent libmpi if [ $? -eq 0 ] ; then update-alternatives --remove-all mpi fi set -e this runs.
