C++ algorithms return None on Windows

[NominHanggai]

Hi Dietmar,

I installed fast-cma-es on Windows 11 following the instructions in README (X64 C++ runtime libraries were also installed). Tried a small optimization:

import numpy as np
from scipy.optimize import Bounds
from fcmaes import cmaescpp, cmaes


def obj(x):
    return np.sum(x**2)

bounds = Bounds([-1, -1], [1, 1])
result = cmaescpp.minimize(obj, bounds)
print(result)

and got the following result:

 success: False
  status: -1
     fun: 1.7976931348623157e+308
       x: None
     nit: 0
    nfev: 0

The python algorithm works (cmaes). Output:

 success: True
  status: 4
     fun: 3.7194596397089263e-19
       x: [ 5.707e-10 -2.152e-10]
     nit: 78
    nfev: 1209

What do you think could be the cause? Thanks :)