My #1 guess: are you calling Math.random() ever? My #2 guess: are you using multiple threads, but not locking on the schedule prior to accessing the generator? Lemme know how it turns out. Sean On Jun 14, 2011, at 11:33 AM, Martinez, Angel wrote: > Sean, > > Thanks. I've rechecked and nextInt() is providing the same start > sequence as expected. Somehow, my code is still producing non- > repeatable > behavior despite the fixed sequence. The ball is in my court now. > > Best, > > Angel Martine > RAND Corporation