Error by wrapping C++ class from a static compiled library with pybind11

[AAUDI]

Hi,

Im trying to bind a c++ library using pybind11. the compilation works well, but I had an error when I tried to import the .so file in a python file:

from project_pybind11 import *
I have this error :

from project_pybind11 import *
ImportError: generic_type: type "class_derived" referenced unknown base 
type "NAMESPACE::class_derived"

Do you have any idea about the origin of this error ? or how I can get more details or information about this error. It can be an error related to the compilation process ?

I bind my class on this way :

PYBIND11_MODULE(project_pybind11,m) {
   py::class_<Pyclass_derived, NAMESPACE::class_derived, NAMESPACE::class_base>(m, "class_derived")
   .def(py::init<>())
   .def(py::init<const NAMESPACE::S_UINT32>(), py::arg("classnameId"))
   .def("method1", &Pyclass_derived::method1);
   .....;
 }

my class .cpp is :

namespace NAMESPACE
{

   class class_derived: public class_base

   {

    public:

    class_derived(); 
    class_derived(const NAMESPACE::S_UINT32 classderivedId);
    virtual void method1();
    ...
  };
}
Pyclass_derived is a class that I implemented to take into account the virtual methods.

 class Pyclass_derived: public NAMESPACE::class_derived{
    public:
      using NAMESPACE::class_derived::class_derived;
      void method1() override { PYBIND11_OVERRIDE(void,  
            NAMESPACE::class_derived, method1); }
     };
 }