Thanks for your reply. I got the message which tells no member named 'getPayload' in 'ndn::Data'. ps. shared_ptr<const Data> contentObject Wonjun, Choi -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.lists.cs.ucla.edu/pipermail/ndnsim/attachments/20150206/36efb771/attachment.html>