Veronica, you should address your requests to LISTSERV AT DEARN, not to LSTSRV-L which is the list. I tried to answer to you directly and send you the help files, but I get an 'address unknown' when I type in your destination, which puzzles me a bit. Anyway, good luck. Alberto... *************************************************************** * ALBERTO GIANOLIO ** [log in to unmask] ** * * THE EUROPEAN SPACE RESEARCH AND TECHNOLOGY CENTRE (ESTEC) * * NOORDWIJK - THE NETHERLANDS *