why python-extension function breaks when creating array of structs with length greater than 4?

I'm writing a python extension module in C. Python stops running when I declare an array of structs greater than 4 elements in a function of that module.

I'm writing the module to increase performance. I've declared 3 structs( "SKU", "Cromosoma", "Aptitud" ) and I want to create an array of Cromosoma, but when I try to create the array with more than 4 elements it breaks.

// need_for_speed.c   extension module code
#include <Python.h>
#include <stdlib.h>
#define MAX_GENES_SIZE  2000
typedef struct{
    char codigo[30];
    double venta;
    char nombre[100];
    double categoria;
    double peso;
    double ubicacion_especifica;
    double ubicacion_actual;
    double ubicacion_a_mover;
    double stock;
} SKU;
typedef struct{
    double ubicaciones_rompe_regla;
    double cercania_medio;
    double desv_std_picks_x_seccion;
    double peso_x_ubicacion;
} Aptitud;
typedef struct{
    SKU genes[MAX_GENES_SIZE];
    Aptitud aptitud;
    int genes_size;
    int edad;
}Cromosoma;

static PyObject* prueba(PyObject* self, PyObject* args){
    Cromosoma a;
    SKU s;
    strcpy(s.codigo,"1212");
    a.genes[0] = s;
    Cromosoma poblacion[] = {a,a,a,a,a};
    printf("codigo %s ", poblacion[0].genes[0].codigo);
    return PyLong_FromDouble(1);
}
static PyMethodDef Methods[] = {
    {"prueba", prueba, METH_NOARGS, "Prueba general"},
    { NULL, NULL, 0, NULL }
};

// Module Definition struct
static struct PyModuleDef need_for_speed = {
    PyModuleDef_HEAD_INIT,
    "need_for_speed",
    "Modulo para aumento de la velocidad de procesamiento para el algoritmo genético",
    -1,
    Methods
};

// Initialize module 
PyMODINIT_FUNC PyInit_need_for_speed(void)
{
    PyObject *m;
    m = PyModule_Create(&need_for_speed);
    return m;
}

the setup.py to build this module:

from distutils.core import setup, Extension
setup(name = 'need_for_speed', version = '1.0',ext_modules = [Extension('need_for_speed', ['need_for_speed.c'])])

command to build module:

python setup.py build

when I call the function prueba:

import need_for_speed
i = need_for_speed.prueba()

python stops running without printing or returning anything, but if modify the array named "poblacion" in the "prueba" function to have only 4 elements it runs perfectly, returning 1 and printing "codigo 1212".

I'm using Windows BTW.