Oops I can't proof read my messages: > However because the openmpi-devel 1.1.1 isn't removed when upgrading the > alternatives it added arn't removed > and being at the same priority as the new ones don't get zapped so > /etc/alternatives/mpicc (etc) still point at > /usr/bin/opal_wrapper-32 which no lomnger exists... I meant to say something more like: ... However upgrading openmpi-devel from 1.1.1 to 1.2.3 doesn't count as 'removal' of 1.1.1. Therefore the alternatives links made by installing openmpi-devel 1.1.1 arn't removed by the upgrade and as the priorities are the same the links don't get updated and /etc/alternatives/mpicc (etc) still point at /usr/bin/opal_wrapper-32 which no lomnger exists... ... Hopefully that is a little bit clearer... -- Jon