Hi, I am running version ns-2.1b4. I tried downloading tcldebug 1.7 as written in ns web page but I found out it is version 1.9. Dbg.h does not exist in version 1.9. Also, I have some problems when running tcldebug 1.9 with my current version of ns. So, would you please return tcl debug 1.7 on the web page. Randa