Import viz from c++

[Ciccio]

Hello,

I wrote my Vizard (5.0) program in py and every work perfectly. Right now, I'm trying to write a program c++ that load the python code and call all the different functions that I wrote (using Python.h).
Everything works fine if I don't import any vizard module but if in my python code I have one or more import viz (or related) the python return this error: "viz module can only be imported by Vizard".

Can anyone help me?

this is my code python:

import sys
sys.path.append('C:/Program Files/WorldViz/Vizard5/python')
import viz


def add(a, b):
	return a+b

and this is my main c++

#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include <string>
#ifdef _DEBUG
#undef _DEBUG
#include <Python.h>
#define _DEBUG
#else
#include <Python.h>
#endif


static const char* PLUGIN_NAME = "Sample";

void PrintTotalRefCount()
{
#ifdef Py_REF_DEBUG
	PyObject* refCount = PyObject_CallObject(PySys_GetObject((char*)"gettotalrefcount"), NULL);
	std::clog << "total refcount = " << PyInt_AsSsize_t(refCount) << std::endl;
	Py_DECREF(refCount);
#endif
}

std::string CallPlugIn(const std::string& ln)
{
	PyObject* name = PyString_FromString(PLUGIN_NAME);
	PyObject* pluginModule = PyImport_Import(name);
	Py_DECREF(name);
	if (!pluginModule)
	{
		PyErr_Print();
		return "Error importing module";
	}
	PyObject* filterFunc = PyObject_GetAttrString(pluginModule, "filterFunc");
	Py_DECREF(pluginModule);
	if (!filterFunc)
	{
		PyErr_Print();
		return "Error retrieving 'filterFunc'";
	}
	PyObject* args = Py_BuildValue("(s)", ln.c_str());
	if (!args)
	{
		PyErr_Print();
		Py_DECREF(filterFunc);
		return "Error building args tuple";
	}
	PyObject* resultObj = PyObject_CallObject(filterFunc, args);
	Py_DECREF(filterFunc);
	Py_DECREF(args);
	if (!resultObj)
	{
		PyErr_Print();
		return "Error invoking 'filterFunc'";
	}
	const char* resultStr = PyString_AsString(resultObj);
	if (!resultStr)
	{
		PyErr_Print();
		Py_DECREF(resultObj);
		return "Error converting result to C string";
	}
	std::string result = resultStr;
	Py_DECREF(resultObj);
	return result;
}

int main(int argc, char* argv[])
{
	Py_Initialize();
	PyObject* sysPath = PySys_GetObject((char*)"path");
	PyObject* curDir = PyString_FromString(".");
	PyList_Append(sysPath, curDir);
	Py_DECREF(curDir);
	std::string input;
	
	CallPlugIn(input);
	PrintTotalRefCount();

	Py_Finalize();
	system("PAUSE");
	return 0;
}