Hi, All I am recording "nam" file while ns running. I used command "$ns namtrace-all $nf" This record the entire simulation time. Can I specify the recording time range? Ex) My simulation is from 0 to 10 seconds. I want to record nam file from 5 to 10 second Thank you in advance. Bong Ho Kim Bell Labs, Lucent Technologies 732-332-6831 [email protected]