Problem with FMU generated from PythonFMU to run with openmcx

[levanthanh3005]

Hi,
I build a new simple FMU from PythonFMU.
My code is just very simple

from pythonfmu import Fmi2Causality, Fmi2Slave, Boolean, Integer, Real, String
import ctypes

class PythonSlave(Fmi2Slave):

    def __init__(self, **kwargs):
        super().__init__(**kwargs)

        self.intOut = 1
        self.realOut = 3.0
        self.realIn = 3.0
        self.booleanVariable = True
        self.stringVariable = "Hello World!"
                
        self.register_variable(Real("realIn", causality=Fmi2Causality.input))
        self.register_variable(Real("realOut", causality=Fmi2Causality.output))        

    def do_step(self, current_time, step_size):
        return True

In my python code, I has "import ctype", and it crashed

Current thread 0x00007fe341b77740 (most recent call first):
<no Python frame>
ERROR: The element FMU caused an unrecoverable error. Shutting down.

This generated FMU run perfectly with fmpy
But I dont know why it crash with openmcx, when I remove the import ctypes, it can work fine.
Any idea to fix it,
Thank you,
T