On Sat, 2010-05-08 at 13:04 -0700, Kirk Peterson wrote: > Do you have the parallel version installed? MRCC is not compatible with a mpp build of Molpro. Can > you install the serial executables? So yes, I can install the serial version - and yes it does work. Thanks for your help Pete -- Pete Biggs pete.biggs @ chem.ox.ac.uk Office: 01865 275490