Hi,

probably has been asked already thousand of times but I'm stuck currently with some code:

Assuming I have the following files (The Base class Action is serialized in the same way):

File: Ping.h 

#include "Action.h"

    
class Ping : public Action {

    

    
    public:

    

    
    void operator()();

    
    Ping();

    
    Ping* clone() const;

    
    ~Ping();

    

    
    template <typename Archive>

    
    void serialize(Archive& ar, const unsigned int);

    

    
};

    

    
BOOST_CLASS_EXPORT_KEY2(Ping, "Ping");


File: Ping.cpp


    
#include "Ping.h" 


    
#include <iostream> 

    
#include <boost/serialization/base_object.hpp>


    
#include <boost/serialization/export.hpp>
#include <boost/serialization/tracking.hpp> 


    
#include "Action.h"

    
#include "system.h"


    
#include "pong.h" 


    
#include "serializerdeserializer.h"


    #include "system.h"
    

    #include "connection.h"
    #include "communication.h"
    

    void Ping::operator()() {
    
    }
    

    Ping::Ping()
    {
    }
    

    Ping* Ping::clone() const {
    

     Ping* ping = new Ping(*this);
    

     return ping;
    

    }
    

    
template <typename Archive>
void Ping::serialize(Archive& ar, const unsigned int) {
    ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(Action);
}


    Ping::~Ping() {}
    

    
BOOST_CLASS_EXPORT_IMPLEMENT(Ping); 


    
BOOST_CLASS_TRACKING(Ping, boost::serialization::track_never);


    



    
If I now compile the project into a library. And link this library to a different project.

    
If I try to serialize the class now it doesn't work.

    
I get the following error:

    
unregistered class - derived class not registered or exported

    



    
According to the boost documentation I need to use BOOST_CLASS_EXPORT_KEY in the header file and BOOST_CLASS_EXPORT_IMPLEMENT in the corresponding cpp file.

    



    
What did I miss?

    



    
Regards,

    
Wolfgang