On Wednesday 25 July 2001 10:52, Sungwon Yi wrote: > $ns at $rng "$cbr0 start" Chapter 21 of the ns Manual, section 21.6 "Commands at a Glance". $rng next-random This returns the next random number from RNG Seems like you should use $ns at [$rng next-random] "$cbr0 start" -- Brian Lee Bowers | RADIANT Team (Summer Intern) [email protected] | Los Alamos National Laboratory