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    <div>Hi, NDN friends. </div><div>  Recently, I have tried to get the expiration period of a router in ndnSIM 2.3, but I got some errors as the following lines show.</div><div><br></div><div>```</div><div>../src/ndnSIM/examples/ndn-kai.cpp: In member function ‘void ns3::print_pit::printStats()’:</div><div>../src/ndnSIM/examples/ndn-kai.cpp:60:60: error: ‘Route’ is not a member of ‘ndn::nfd’</div><div>   auto expired_time = Names::Find<Node>("CR-0")->GetObject<::ndn::nfd::Route>()->getExpirationPeriod();</div><div> ```</div><div><br></div><div>I have checked the API docs at the ndnSIM 2.3 home page (<span style="line-height: 22.4px;">http://ndnsim.net/2.3/doxygen/classndn_1_1nfd_1_1Route.html#a1032a5317eaa87513bf00d58d5e7cbb4</span><span style="line-height: 1.6;">). It seems like that `Route` is a member of `ndn::nfd`. But why these errors happened? Anyone has some ideals or advises?  Thanks!!! </span></div><div><br></div><div>BTW, I have installed ndnSIM 2.3 a few months ago, but I checked the VERSION file and got a "2.0.0" string. Is there any other ways to check the ndnSIM version?</div><div><br></div>
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