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 :)

[andrea-tango]

Dear all,

I am also facing the same issue on Ubuntu!

The Python algorithm works (cmaes) while the cpp version returns None.
Can you please help me?

Thank you in advance.

Best,
Andrea

[dietmarwo]

Please update to 1.6.11
pip install fcmaes --upgrade

I checked under Windows 10 and Linux Mint 21.3 using miniforge https://github.com/conda-forge/miniforge with python 10
and cannot reproduce the issue. If you can still can reproduce with 1.6.11 please provide more details about your environment.

I get:

success: True
status: 4
fun: 4.04350308835685e-15
x: [ 1.826e-08 6.091e-08]
nit: 31
nfev: 961