To generate the node movements for wireless scenario, I wrote: ./setdest -n 20 -p 2.0 -s 10.0 -t 200.0 -x 1000 -y 1000 > scen-1000X1000-20-4-4 It gives me the message: ./setdest: Exec format error What could be the error and how to rectify it? Ahmad __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/