Take the 'a' version. Nader > Hi ns-users, > I like to reinstall ns. Should I download ns-allinone-2.1b6a.tar.gz or > ns-allinone-2.1b6.tar.gz?. > Thank you very much, > Cindy > Diepchi Tran > Phone (216) 433-8861 > Fax (216) 433-8705