Dear ns-users, I have installed ns with the www model file tcp-www.cc. But when I run ns and say source httpModel.tcl, it gives invalid command name "Agent/TCP/WWW" error. I will be grateful if anyone has seen the error in my statement, and given me the right way. Thanks in advance.. Deniz GURKAN e-mail: [email protected] URL: http://www.ee.bilkent.edu.tr/~deniz/