Hi, all: I developed a new link layer, which is derived from LL in ns, and I want to create a trace for this new link layer. From mac.h(cc), and mac-802_11.cc(h), they have a logtarget in Mac or Mac_802_11, but the logtarget_ need to be initialized. I guess it needs to be initialized to a Trace object?? and where can I initialize it?? in some tcl file?? THANKS for any feedback! yan