[ndnSIM] (no subject)

[amulya amy]

Hello Folks...
I am new to ndnsim and whenever i run

NS_LOG=DumbRequester:ndn.cs.Freshness.Lru ./waf
--run=ndn-simple-with-content-freshness

I encounter a  problem

 msg="Invalid or unregistered component name "DumbRequester" in env
variable NS_LOG, see above for a list of valid components",
file=../src/core/model/log.cc, line=567
terminate called without an active exception
Command ['/home/iiitd/ndnSIM/ns-3/build/src/ndnSIM/examples/ns3-dev-ndn-simple-with-content-freshness-debug']
terminated with signal SIGIOT. Run it under a debugger to get more
information (./waf --run <program> --command-template="gdb --args %s
<args>").
.

How to resolve it? please help
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