diff --git a/utils/tracers/l2-rate-tracer.cc b/utils/tracers/l2-rate-tracer.cc
index cf4af72..48d2589 100644
--- a/utils/tracers/l2-rate-tracer.cc
+++ b/utils/tracers/l2-rate-tracer.cc
@@ -38,15 +38,36 @@
 
 namespace ns3 {
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L2RateTracer> > >
+static std::list< boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L2RateTracer> > > > g_tracers;
+
+template<class T>
+static inline void
+NullDeleter (T *ptr)
+{
+}
+
+void
 L2RateTracer::InstallAll (const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   std::list<Ptr<L2RateTracer> > tracers;
-  boost::shared_ptr<std::ofstream> outputStream (new std::ofstream ());
-  outputStream->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
+  boost::shared_ptr<std::ostream> outputStream;
+  if (file != "-")
+    {
+      boost::shared_ptr<std::ofstream> os (new std::ofstream ());
+      os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
-  if (!outputStream->is_open ())
-    return boost::make_tuple (outputStream, tracers);
+      if (!os->is_open ())
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
+
+      outputStream = os;
+    }
+  else
+    {
+      outputStream = boost::shared_ptr<std::ostream> (&std::cout, NullDeleter<std::ostream>);
+    }
 
   for (NodeList::Iterator node = NodeList::Begin ();
        node != NodeList::End ();
@@ -66,7 +87,7 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
 
diff --git a/utils/tracers/l2-rate-tracer.h b/utils/tracers/l2-rate-tracer.h
index de6ffcb..8dba680 100644
--- a/utils/tracers/l2-rate-tracer.h
+++ b/utils/tracers/l2-rate-tracer.h
@@ -58,7 +58,7 @@
    *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
    *
    */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L2RateTracer> > >
+  static void
   InstallAll (const std::string &file, Time averagingPeriod = Seconds (0.5));
 
   void
diff --git a/utils/tracers/ndn-app-delay-tracer.cc b/utils/tracers/ndn-app-delay-tracer.cc
index 230be84..c0f881d 100644
--- a/utils/tracers/ndn-app-delay-tracer.cc
+++ b/utils/tracers/ndn-app-delay-tracer.cc
@@ -44,13 +44,15 @@
 namespace ns3 {
 namespace ndn {
 
+static std::list< boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<AppDelayTracer> > > > g_tracers;
+
 template<class T>
 static inline void
 NullDeleter (T *ptr)
 {
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<AppDelayTracer> > >
+void
 AppDelayTracer::InstallAll (const std::string &file)
 {
   using namespace boost;
@@ -64,7 +66,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-        return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -88,10 +93,10 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<AppDelayTracer> > >
+void
 AppDelayTracer::Install (const NodeContainer &nodes, const std::string &file)
 {
   using namespace boost;
@@ -105,7 +110,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-        return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -129,10 +137,10 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<AppDelayTracer> > >
+void
 AppDelayTracer::Install (Ptr<Node> node, const std::string &file)
 {
   using namespace boost;
@@ -146,7 +154,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-        return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -165,7 +176,7 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
 
diff --git a/utils/tracers/ndn-app-delay-tracer.h b/utils/tracers/ndn-app-delay-tracer.h
index dfbe5ea..d7b1a72 100644
--- a/utils/tracers/ndn-app-delay-tracer.h
+++ b/utils/tracers/ndn-app-delay-tracer.h
@@ -56,7 +56,7 @@
    *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
    * 
    */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<AppDelayTracer> > >
+  static void
   InstallAll (const std::string &file);
 
   /**
@@ -69,7 +69,7 @@
    *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
    *
    */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<AppDelayTracer> > >
+  static void
   Install (const NodeContainer &nodes, const std::string &file);
 
   /**
@@ -83,7 +83,7 @@
    *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
    *
    */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<AppDelayTracer> > >
+  static void
   Install (Ptr<Node> node, const std::string &file);
 
   /**
diff --git a/utils/tracers/ndn-cs-tracer.cc b/utils/tracers/ndn-cs-tracer.cc
index 40aed8f..0c1becb 100644
--- a/utils/tracers/ndn-cs-tracer.cc
+++ b/utils/tracers/ndn-cs-tracer.cc
@@ -44,13 +44,15 @@
 namespace ns3 {
 namespace ndn {
 
+static std::list< boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<CsTracer> > > > g_tracers;
+
 template<class T>
 static inline void
 NullDeleter (T *ptr)
 {
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<CsTracer> > >
+void
 CsTracer::InstallAll (const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   using namespace boost;
@@ -64,7 +66,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-        return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -88,10 +93,10 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<CsTracer> > >
+void
 CsTracer::Install (const NodeContainer &nodes, const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   using namespace boost;
@@ -105,7 +110,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-        return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -129,10 +137,10 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<CsTracer> > >
+void
 CsTracer::Install (Ptr<Node> node, const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   using namespace boost;
@@ -146,7 +154,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-        return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -165,14 +176,14 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
 
 Ptr<CsTracer>
 CsTracer::Install (Ptr<Node> node,
-                       boost::shared_ptr<std::ostream> outputStream,
-                       Time averagingPeriod/* = Seconds (0.5)*/)
+                   boost::shared_ptr<std::ostream> outputStream,
+                   Time averagingPeriod/* = Seconds (0.5)*/)
 {
   NS_LOG_DEBUG ("Node: " << node->GetId ());
 
diff --git a/utils/tracers/ndn-cs-tracer.h b/utils/tracers/ndn-cs-tracer.h
index fc8e0fc..0bddfb6 100644
--- a/utils/tracers/ndn-cs-tracer.h
+++ b/utils/tracers/ndn-cs-tracer.h
@@ -80,7 +80,7 @@
    *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
    * 
    */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<CsTracer> > >
+  static void
   InstallAll (const std::string &file, Time averagingPeriod = Seconds (0.5));
 
   /**
@@ -94,7 +94,7 @@
    *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
    *
    */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<CsTracer> > >
+  static void
   Install (const NodeContainer &nodes, const std::string &file, Time averagingPeriod = Seconds (0.5));
 
   /**
@@ -108,7 +108,7 @@
    *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
    *
    */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<CsTracer> > >
+  static void
   Install (Ptr<Node> node, const std::string &file, Time averagingPeriod = Seconds (0.5));
 
   /**
diff --git a/utils/tracers/ndn-l3-aggregate-tracer.cc b/utils/tracers/ndn-l3-aggregate-tracer.cc
index e977285..c6fc5e3 100644
--- a/utils/tracers/ndn-l3-aggregate-tracer.cc
+++ b/utils/tracers/ndn-l3-aggregate-tracer.cc
@@ -41,13 +41,15 @@
 namespace ns3 {
 namespace ndn {
 
+static std::list< boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3AggregateTracer> > > > g_tracers;
+
 template<class T>
 static inline void
 NullDeleter (T *ptr)
 {
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3AggregateTracer> > >
+void
 L3AggregateTracer::InstallAll (const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   using namespace boost;
@@ -61,7 +63,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-    return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -85,10 +90,10 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3AggregateTracer> > >
+void
 L3AggregateTracer::Install (const NodeContainer &nodes, const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   using namespace boost;
@@ -102,7 +107,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-    return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -126,10 +134,10 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3AggregateTracer> > >
+void
 L3AggregateTracer::Install (Ptr<Node> node, const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   using namespace boost;
@@ -143,7 +151,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-    return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -162,7 +173,7 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
 
diff --git a/utils/tracers/ndn-l3-aggregate-tracer.h b/utils/tracers/ndn-l3-aggregate-tracer.h
index ca6b35a..b7d4ce7 100644
--- a/utils/tracers/ndn-l3-aggregate-tracer.h
+++ b/utils/tracers/ndn-l3-aggregate-tracer.h
@@ -43,6 +43,47 @@
 {
 public:
   /**
+   * @brief Helper method to install tracers on all simulation nodes
+   *
+   * @param file File to which traces will be written.  If filename is -, then std::out is used
+   * @param averagingPeriod How often data will be written into the trace file (default, every half second)
+   *
+   * @returns a tuple of reference to output stream and list of tracers. !!! Attention !!! This tuple needs to be preserved
+   *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
+   *
+   */
+  static void
+  InstallAll (const std::string &file, Time averagingPeriod = Seconds (0.5));
+
+  /**
+   * @brief Helper method to install tracers on the selected simulation nodes
+   *
+   * @param nodes Nodes on which to install tracer
+   * @param file File to which traces will be written.  If filename is -, then std::out is used
+   * @param averagingPeriod How often data will be written into the trace file (default, every half second)
+   *
+   * @returns a tuple of reference to output stream and list of tracers. !!! Attention !!! This tuple needs to be preserved
+   *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
+   *
+   */
+  static void
+  Install (const NodeContainer &nodes, const std::string &file, Time averagingPeriod = Seconds (0.5));
+
+  /**
+   * @brief Helper method to install tracers on a specific simulation node
+   *
+   * @param nodes Nodes on which to install tracer
+   * @param file File to which traces will be written.  If filename is -, then std::out is used
+   * @param averagingPeriod How often data will be written into the trace file (default, every half second)
+   *
+   * @returns a tuple of reference to output stream and list of tracers. !!! Attention !!! This tuple needs to be preserved
+   *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
+   *
+   */
+  static void
+  Install (Ptr<Node> node, const std::string &file, Time averagingPeriod = Seconds (0.5));
+
+  /**
    * @brief Trace constructor that attaches to the node using node pointer
    * @param os    reference to the output stream
    * @param node  pointer to the node
@@ -62,47 +103,6 @@
   virtual ~L3AggregateTracer ();
 
   /**
-   * @brief Helper method to install tracers on all simulation nodes
-   *
-   * @param file File to which traces will be written.  If filename is -, then std::out is used
-   * @param averagingPeriod How often data will be written into the trace file (default, every half second)
-   *
-   * @returns a tuple of reference to output stream and list of tracers. !!! Attention !!! This tuple needs to be preserved
-   *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
-   *
-   */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3AggregateTracer> > >
-  InstallAll (const std::string &file, Time averagingPeriod = Seconds (0.5));
-
-  /**
-   * @brief Helper method to install tracers on the selected simulation nodes
-   *
-   * @param nodes Nodes on which to install tracer
-   * @param file File to which traces will be written.  If filename is -, then std::out is used
-   * @param averagingPeriod How often data will be written into the trace file (default, every half second)
-   *
-   * @returns a tuple of reference to output stream and list of tracers. !!! Attention !!! This tuple needs to be preserved
-   *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
-   *
-   */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3AggregateTracer> > >
-  Install (const NodeContainer &nodes, const std::string &file, Time averagingPeriod = Seconds (0.5));
-
-  /**
-   * @brief Helper method to install tracers on a specific simulation node
-   *
-   * @param nodes Nodes on which to install tracer
-   * @param file File to which traces will be written.  If filename is -, then std::out is used
-   * @param averagingPeriod How often data will be written into the trace file (default, every half second)
-   *
-   * @returns a tuple of reference to output stream and list of tracers. !!! Attention !!! This tuple needs to be preserved
-   *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
-   *
-   */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3AggregateTracer> > >
-  Install (Ptr<Node> node, const std::string &file, Time averagingPeriod = Seconds (0.5));
-
-  /**
    * @brief Helper method to install tracers on a specific simulation node
    *
    * @param nodes Nodes on which to install tracer
diff --git a/utils/tracers/ndn-l3-rate-tracer.cc b/utils/tracers/ndn-l3-rate-tracer.cc
index 43f8f0a..435a652 100644
--- a/utils/tracers/ndn-l3-rate-tracer.cc
+++ b/utils/tracers/ndn-l3-rate-tracer.cc
@@ -44,13 +44,15 @@
 namespace ns3 {
 namespace ndn {
 
+static std::list< boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3RateTracer> > > > g_tracers;
+
 template<class T>
 static inline void
 NullDeleter (T *ptr)
 {
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3RateTracer> > >
+void
 L3RateTracer::InstallAll (const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   std::list<Ptr<L3RateTracer> > tracers;
@@ -61,7 +63,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-    return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -85,10 +90,10 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3RateTracer> > >
+void
 L3RateTracer::Install (const NodeContainer &nodes, const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   using namespace boost;
@@ -102,7 +107,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-        return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -126,10 +134,10 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
-boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3RateTracer> > >
+void
 L3RateTracer::Install (Ptr<Node> node, const std::string &file, Time averagingPeriod/* = Seconds (0.5)*/)
 {
   using namespace boost;
@@ -143,7 +151,10 @@
       os->open (file.c_str (), std::ios_base::out | std::ios_base::trunc);
 
       if (!os->is_open ())
-        return boost::make_tuple (outputStream, tracers);
+        {
+          NS_LOG_ERROR ("File " << file << " cannot be opened for writing. Tracing disabled");
+          return;
+        }
 
       outputStream = os;
     }
@@ -162,7 +173,7 @@
       *outputStream << "\n";
     }
 
-  return boost::make_tuple (outputStream, tracers);
+  g_tracers.push_back (boost::make_tuple (outputStream, tracers));
 }
 
 
diff --git a/utils/tracers/ndn-l3-rate-tracer.h b/utils/tracers/ndn-l3-rate-tracer.h
index d2f965b..e2931d9 100644
--- a/utils/tracers/ndn-l3-rate-tracer.h
+++ b/utils/tracers/ndn-l3-rate-tracer.h
@@ -43,6 +43,36 @@
 {
 public:
   /**
+   * @brief Helper method to install tracers on all simulation nodes
+   *
+   * @param file File to which traces will be written.  If filename is -, then std::out is used
+   * @param averagingPeriod Defines averaging period for the rate calculation,
+   *        as well as how often data will be written into the trace file (default, every half second)
+   */
+  static void
+  InstallAll (const std::string &file, Time averagingPeriod = Seconds (0.5));
+
+  /**
+   * @brief Helper method to install tracers on the selected simulation nodes
+   *
+   * @param nodes Nodes on which to install tracer
+   * @param file File to which traces will be written.  If filename is -, then std::out is used
+   * @param averagingPeriod How often data will be written into the trace file (default, every half second)
+   */
+  static void
+  Install (const NodeContainer &nodes, const std::string &file, Time averagingPeriod = Seconds (0.5));
+
+  /**
+   * @brief Helper method to install tracers on a specific simulation node
+   *
+   * @param nodes Nodes on which to install tracer
+   * @param file File to which traces will be written.  If filename is -, then std::out is used
+   * @param averagingPeriod How often data will be written into the trace file (default, every half second)
+   */
+  static void
+  Install (Ptr<Node> node, const std::string &file, Time averagingPeriod = Seconds (0.5));
+  
+  /**
    * @brief Trace constructor that attaches to the node using node pointer
    * @param os    reference to the output stream
    * @param node  pointer to the node
@@ -62,48 +92,6 @@
   virtual ~L3RateTracer ();
 
   /**
-   * @brief Helper method to install tracers on all simulation nodes
-   *
-   * @param file File to which traces will be written.  If filename is -, then std::out is used
-   * @param averagingPeriod Defines averaging period for the rate calculation,
-   *        as well as how often data will be written into the trace file (default, every half second)
-   *
-   * @returns a tuple of reference to output stream and list of tracers. !!! Attention !!! This tuple needs to be preserved
-   *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
-   *
-   */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3RateTracer> > >
-  InstallAll (const std::string &file, Time averagingPeriod = Seconds (0.5));
-
-  /**
-   * @brief Helper method to install tracers on the selected simulation nodes
-   *
-   * @param nodes Nodes on which to install tracer
-   * @param file File to which traces will be written.  If filename is -, then std::out is used
-   * @param averagingPeriod How often data will be written into the trace file (default, every half second)
-   *
-   * @returns a tuple of reference to output stream and list of tracers. !!! Attention !!! This tuple needs to be preserved
-   *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
-   *
-   */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3RateTracer> > >
-  Install (const NodeContainer &nodes, const std::string &file, Time averagingPeriod = Seconds (0.5));
-
-  /**
-   * @brief Helper method to install tracers on a specific simulation node
-   *
-   * @param nodes Nodes on which to install tracer
-   * @param file File to which traces will be written.  If filename is -, then std::out is used
-   * @param averagingPeriod How often data will be written into the trace file (default, every half second)
-   *
-   * @returns a tuple of reference to output stream and list of tracers. !!! Attention !!! This tuple needs to be preserved
-   *          for the lifetime of simulation, otherwise SEGFAULTs are inevitable
-   *
-   */
-  static boost::tuple< boost::shared_ptr<std::ostream>, std::list<Ptr<L3RateTracer> > >
-  Install (Ptr<Node> node, const std::string &file, Time averagingPeriod = Seconds (0.5));
-
-  /**
    * @brief Helper method to install tracers on a specific simulation node
    *
    * @param nodes Nodes on which to install tracer