Hi, I am adding a new agent which inherits from Reno. So the class name is: Agent/TCP/Reno/MyAgent I have a binding in the C++ constructor of that class as follows: bind("my_var_", &my_var_); Compilation works fine, but when I run ns I get the following warning: warning: no class variable Agent/TCP/Reno/MyAgent::my_var_ I was wondering what is the reason of this warning ? Thanks in advance, -- Amr