Hello! I found out a little bug in NAM version 1.0a10 (latest ns-allinone). You probably already know, but I'll post it anyway, hoping it might be useful to you: Whenever I try to connect two UDP agents nothing happens, but when I try to save the file NAM crashes (seg fault). Thanks a lot for your attention and keep the good work! Giulio Ardoino University of Genova, Italy.