I've been looking thru src_test.tcl which is an example of Source Routing. My problem is that doesn't run, ns stops with: _o3: unable to dispatch method src_rting while executing "$ns src_rting 1" (file "src_test.tcl" line 11) It looks like ns doesn't have this code for Source Routing which the example is looking for. What am I doing wrong? Thanks in advance, G.