[ns] no target for slot 0

Hi All, I am writing a new clustering protocol for MANETs but I am getting a error as ---Classifier::no-slot{} default handler(tcl/lib/ns-lib.tcl)___ _031:no target for slot 0 _031 type: Classifier/Port content dump: classifier _031 0 offset 0

[ns] Problem in broadcasting packet for new protocol

Hi All, I have written a new clusteriing protocol, whenever i send request frm a node to its neighbor i use target_ as the handler eg. scheduler::instance.schedule(target_, p, 0); but while running i am getting the error Scheduler: attempt to schedule the event with NULL handler.