Add NACK processing
diff --git a/model/ccnx-pit-entry-outgoing-face.cc b/model/ccnx-pit-entry-outgoing-face.cc
index ccdfb08..c15df71 100644
--- a/model/ccnx-pit-entry-outgoing-face.cc
+++ b/model/ccnx-pit-entry-outgoing-face.cc
@@ -27,7 +27,7 @@
 CcnxPitEntryOutgoingFace::CcnxPitEntryOutgoingFace (Ptr<CcnxFace> face)
   : m_face (face)
   , m_sendTime (Simulator::Now ())
-  , m_retxNum (0)
+  // , m_retxNum (0)
   // , m_nonce (nonce)
   // , m_outstanding (true)
   // , m_waitingInVain (false)