Hi - those were not recommended lines - they were the possibly problematic lines in the script…. You have exactly the same OS as me - possibly you have a different shell/environment or non-default versions of tail/head/sort? Maybe you could get your sysad to look into this? Cheers. On 10 Sep 2012, at 12:51, Dan wrote: > Hi Steve, > > thank you for the answer. I'll try the recommended command lines later and will give a short response if it is working or not. > I am running Mac OSX 10.6.8. > > Best, > Dan > --------------------------------------------------------------------------- Stephen M. Smith, Professor of Biomedical Engineering Associate Director, Oxford University FMRIB Centre FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 222726 (fax 222717) [log in to unmask] http://www.fmrib.ox.ac.uk/~steve ---------------------------------------------------------------------------