Problem sorted. Thanks Jean-Sebastien. Chris. Dr Christian Hicks Senior Lecturer, Director of Postgraduate Training, School of Mechanical & Systems Engineering, Stephenson Building, University of Newcastle upon Tyne, NE1 7RU. Phone: +44 191 222 6238 Mobile 0796 398 9449 Fax: + 44 191 222 8600 Homepage: http://www.staff.ncl.ac.uk/chris.hicks