I've just seen a typo in my previous email about this: .Xcms.txt should, of course, be: Xcms.txt Thanks, Tony. -- Dr. A.J.Travis, | mailto:ajt at rri.sari.ac.uk Rowett Research Institute, | http://www.rri.sari.ac.uk/~ajt Greenburn Road, Bucksburn, | phone:+44 (0)1224 712751 Aberdeen AB21 9SB, Scotland, UK. | fax:+44 (0)1224 716687