Remeber that you need to configure your NS with --with-tcldebug=/path/to/your/tcl/debug. Nader >>> "Hrishikesh" == Hrishikesh Gossain <[email protected]> writes: Hrishikesh> hi all, Hrishikesh> i have installed tcldebugger with my NS. I am wondering Hrishikesh> how to use "debug" . Like where should i insert "debug Hrishikesh> 1". Hrishikesh> i would appreciate any kind of help Hrishikesh> thanks rishi