[ndnSIM] An Error while running ndnsim 2.1

[杨伟宏]

Hi,
I try to run the ndnsim 2.1 today.

However, there is an error occurs:
terminate called after throwing an instance of 
'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<nfd::rib::RibManager::Error> 
 >'
   what():  Error in setting interest filter (/localhost/nfd/rib): 
request timed out.

I was curious because this error has never occurred before. Could anyone 
give me some hints about where I went wrong.

Weihong Yang