[ndnSIM] Error: cannot convert ‘ns3::ndn::PitTracer*’ to ‘ns3::ObjectBase*’ in initialization

[Sai Gautam Mandapati]

Hi everyone,

I have a question.  I'm trying to develop a PitTracer for my simulations.
Currently, I'm facing one error.

*From the header file: .hpp*
class PitTracer : public L3Tracer {
public:
  static TypeId GetTypeId();
  PitTracer();
  /**
   * @brief Constructor
   *
   * @param filename Output filename.
   */
   PitTracer(const std::string& filename);
  /**
   * @brief Destructor
   */
 virtual ~PitTracer();
 virtual void Trace(std::string context, Ptr<const Packet> packet,
Ptr<L3Protocol> l3);

*From the implementation file: .cpp*

NS_OBJECT_ENSURE_REGISTERED(PitTracer);

TypeId PitTracer::GetTypeId(void)
{
  static TypeId tid =
   TypeId("ns3::ndn::PitTracer")
    .SetParent<L3Protocol>()
    .SetGroupName("Ndn")
    .AddConstructor<PitTracer>()
    .AddConstructor<PitTracer , const std::string&>()
    //.AddConstructor<PitTracer>()
    .AddAttribute("Filename", "Output filename",
                  StringValue("pit-sizes.txt"),
                  MakeStringAccessor(&PitTracer::m_outputFilename),
                  MakeStringChecker())
    .AddAttribute("Interval", "Interval at which to write PIT sizes to
output file",
                  TimeValue(Seconds(1.0)),
                  MakeTimeAccessor(&PitTracer::m_interval),
                  MakeTimeChecker());

  return tid;
}

*Error:*
./ns3/type-id.h: In instantiation of ‘static ns3::ObjectBase*
ns3::TypeId::AddConstructor()::Maker::Create() [with T =
ns3::ndn::PitTracer]’:
./ns3/type-id.h:659:3:   required from ‘ns3::TypeId
ns3::TypeId::AddConstructor() [with T = ns3::ndn::PitTracer]’
../src/ndnSIM/utils/tracers/pit-tracer.cpp:41:32:   required from here
./ns3/type-id.h:656:20: error: cannot convert ‘ns3::ndn::PitTracer*’ to
‘ns3::ObjectBase*’ in initialization
  656 |       ObjectBase * base = new T ();
      |                    ^~~~
-- 
Please help me out in resolving this error. Thank you so much in advance.

Sai Gautam
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