@@ -, +, @@ 
 longer Objects
--- a/src/topology-read/helper/topology-reader-helper.cc	
+++ a/src/topology-read/helper/topology-reader-helper.cc	
@@ -47,7 +47,6 @@ TopologyReaderHelper::SetFileType (const std::string fileType)
   m_fileType = fileType;
 }
 
-
 Ptr<TopologyReader>
 TopologyReaderHelper::GetTopologyReader ()
 {
@@ -59,17 +58,17 @@ TopologyReaderHelper::GetTopologyReader ()
       if (m_fileType == "Orbis")
         {
           NS_LOG_INFO ("Creating Orbis formatted data input.");
-          m_inFile = CreateObject<OrbisTopologyReader> ();
+          m_inFile = Create<OrbisTopologyReader> ();
         }
       else if (m_fileType == "Inet")
         {
           NS_LOG_INFO ("Creating Inet formatted data input.");
-          m_inFile = CreateObject<InetTopologyReader> ();
+          m_inFile = Create<InetTopologyReader> ();
         }
       else if (m_fileType == "Rocketfuel")
         {
           NS_LOG_INFO ("Creating Rocketfuel formatted data input.");
-          m_inFile = CreateObject<RocketfuelTopologyReader> ();
+          m_inFile = Create<RocketfuelTopologyReader> ();
         }
       else
         {
--- a/src/topology-read/helper/topology-reader-helper.h	
+++ a/src/topology-read/helper/topology-reader-helper.h	
@@ -22,11 +22,10 @@ 
 #ifndef TOPOLOGY_READER_HELPER_H
 #define TOPOLOGY_READER_HELPER_H
 
-#include "ns3/topology-reader.h"
-#include <string>
-
 namespace ns3 {
 
+class TopologyReader;
+
 /**
  * \ingroup topology
  *
--- a/src/topology-read/model/inet-topology-reader.cc	
+++ a/src/topology-read/model/inet-topology-reader.cc	
@@ -28,19 +28,19 @@ 
 
 using namespace std;
 
-namespace ns3 {
-
 NS_LOG_COMPONENT_DEFINE ("InetTopologyReader");
 
-NS_OBJECT_ENSURE_REGISTERED (InetTopologyReader);
+namespace ns3 {
+
+// NS_OBJECT_ENSURE_REGISTERED (InetTopologyReader);
 
-TypeId InetTopologyReader::GetTypeId (void)
-{
-  static TypeId tid = TypeId ("ns3::InetTopologyReader")
-    .SetParent<Object> ()
-  ;
-  return tid;
-}
+// TypeId InetTopologyReader::GetTypeId (void)
+// {
+//   static TypeId tid = TypeId ("ns3::InetTopologyReader")
+//     .SetParent<Object> ()
+//   ;
+//   return tid;
+// }
 
 InetTopologyReader::InetTopologyReader ()
 {
--- a/src/topology-read/model/inet-topology-reader.h	
+++ a/src/topology-read/model/inet-topology-reader.h	
@@ -47,7 +47,7 @@ namespace ns3 {
 class InetTopologyReader : public TopologyReader
 {
 public:
-  static TypeId GetTypeId (void);
+  // static TypeId GetTypeId (void);
 
   InetTopologyReader ();
   virtual ~InetTopologyReader ();
--- a/src/topology-read/model/orbis-topology-reader.cc	
+++ a/src/topology-read/model/orbis-topology-reader.cc	
@@ -29,19 +29,19 @@ 
 
 using namespace std;
 
-namespace ns3 {
-
 NS_LOG_COMPONENT_DEFINE ("OrbisTopologyReader");
 
-NS_OBJECT_ENSURE_REGISTERED (OrbisTopologyReader);
+namespace ns3 {
+
+// NS_OBJECT_ENSURE_REGISTERED (OrbisTopologyReader);
 
-TypeId OrbisTopologyReader::GetTypeId (void)
-{
-  static TypeId tid = TypeId ("ns3::OrbisTopologyReader")
-    .SetParent<Object> ()
-  ;
-  return tid;
-}
+// TypeId OrbisTopologyReader::GetTypeId (void)
+// {
+//   static TypeId tid = TypeId ("ns3::OrbisTopologyReader")
+//     .SetParent<Object> ()
+//   ;
+//   return tid;
+// }
 
 OrbisTopologyReader::OrbisTopologyReader ()
 {
--- a/src/topology-read/model/orbis-topology-reader.h	
+++ a/src/topology-read/model/orbis-topology-reader.h	
@@ -44,7 +44,7 @@ namespace ns3 {
 class OrbisTopologyReader : public TopologyReader
 {
 public:
-  static TypeId GetTypeId (void);
+  // static TypeId GetTypeId (void);
 
   OrbisTopologyReader ();
   virtual ~OrbisTopologyReader ();
--- a/src/topology-read/model/rocketfuel-topology-reader.cc	
+++ a/src/topology-read/model/rocketfuel-topology-reader.cc	
@@ -28,19 +28,19 @@ 
 #include "ns3/unused.h"
 #include "rocketfuel-topology-reader.h"
 
-namespace ns3 {
-
 NS_LOG_COMPONENT_DEFINE ("RocketfuelTopologyReader");
 
-NS_OBJECT_ENSURE_REGISTERED (RocketfuelTopologyReader);
+namespace ns3 {
+
+// NS_OBJECT_ENSURE_REGISTERED (RocketfuelTopologyReader);
 
-TypeId RocketfuelTopologyReader::GetTypeId (void)
-{
-  static TypeId tid = TypeId ("ns3::RocketfuelTopologyReader")
-    .SetParent<Object> ()
-  ;
-  return tid;
-}
+// TypeId RocketfuelTopologyReader::GetTypeId (void)
+// {
+//   static TypeId tid = TypeId ("ns3::RocketfuelTopologyReader")
+//     .SetParent<Object> ()
+//   ;
+//   return tid;
+// }
 
 RocketfuelTopologyReader::RocketfuelTopologyReader ()
 {
--- a/src/topology-read/model/rocketfuel-topology-reader.h	
+++ a/src/topology-read/model/rocketfuel-topology-reader.h	
@@ -21,7 +21,6 @@ 
 #ifndef ROCKETFUEL_TOPOLOGY_READER_H
 #define ROCKETFUEL_TOPOLOGY_READER_H
 
-#include "ns3/nstime.h"
 #include "topology-reader.h"
 
 namespace ns3 {
@@ -43,7 +42,7 @@ namespace ns3 {
 class RocketfuelTopologyReader : public TopologyReader
 {
 public:
-  static TypeId GetTypeId (void);
+  // static TypeId GetTypeId (void);
 
   RocketfuelTopologyReader ();
   virtual ~RocketfuelTopologyReader ();
--- a/src/topology-read/model/topology-reader.cc	
+++ a/src/topology-read/model/topology-reader.cc	
@@ -19,24 +19,23 @@ 
  * Author: Valerio Sartini (valesar@gmail.com)
  */
 
-#include "ns3/log.h"
-
 #include "topology-reader.h"
 
+#include "ns3/log.h"
 
 namespace ns3 {
 
 NS_LOG_COMPONENT_DEFINE ("TopologyReader");
 
-NS_OBJECT_ENSURE_REGISTERED (TopologyReader);
+// NS_OBJECT_ENSURE_REGISTERED (TopologyReader);
 
-TypeId TopologyReader::GetTypeId (void)
-{
-  static TypeId tid = TypeId ("ns3::TopologyReader")
-    .SetParent<Object> ()
-  ;
-  return tid;
-}
+// TypeId TopologyReader::GetTypeId (void)
+// {
+//   static TypeId tid = TypeId ("ns3::TopologyReader")
+//     .SetParent<Object> ()
+//   ;
+//   return tid;
+// }
 
 TopologyReader::TopologyReader ()
 {
--- a/src/topology-read/model/topology-reader.h	
+++ a/src/topology-read/model/topology-reader.h	
@@ -22,13 +22,11 @@ 
 #ifndef TOPOLOGY_READER_H
 #define TOPOLOGY_READER_H
 
-#include <string>
 #include <map>
 #include <list>
 
-#include "ns3/object.h"
 #include "ns3/node-container.h"
-
+#include "ns3/simple-ref-count.h"
 
 namespace ns3 {
 
@@ -42,7 +40,7 @@ class NetDevice;
  * This interface perform the shared tasks among all possible input file readers.
  * Each different file format is handled by its own topology reader.
  */
-class TopologyReader : public Object
+class TopologyReader : public SimpleRefCount<TopologyReader>
 {
 
 public:
@@ -157,7 +155,7 @@ private:
    */
   typedef std::list< Link >::const_iterator ConstLinksIterator;
 
-  static TypeId GetTypeId (void);
+  // static TypeId GetTypeId (void);
 
   TopologyReader ();
   virtual ~TopologyReader ();
--