The respones to my call for help have worked. AND I AM SMILING! This one example alone proves, to me, the value of this list and CLUG. Adrian -- Adrian Blake Molonglo Radio Observatory University of Sydney 1152 Hoskinstown Rd Bungendore 2621 ph 02 62382262 mobile 0407 232 978 http://www.physics.usyd.edu.au/astrop/most/