OSError: [WinError 10048] Only one usage of each socket address (protocol/network address/port) is normally permitted: (‘’, 9036)

Builder
1

OS: Win11
PsychoPy version: 2.3

I receive this error message whenever I try to run the test. Does anyone know how to solve it?

936.4914 INFO Loaded monitor calibration from [‘2024_10_24 17:21’]
936.5507 INFO Loaded monitor calibration from [‘2024_10_24 17:21’]
Traceback (most recent call last):
File “C:\Program Files\lib\site-packages\psychopy\iohub\start_iohub_process.py”, line 56, in run
s.udpService.start()
File “C:\Program Files\lib\site-packages\gevent\baseserver.py”, line 336, in start
self.init_socket()
File “C:\Program Files\lib\site-packages\gevent\server.py”, line 229, in init_socket
self.socket = self.get_listener(self.address, self.family)
File “C:\Program Files\lib\site-packages\gevent\server.py”, line 239, in get_listener
return _udp_socket(address, reuse_addr=cls.reuse_addr, family=family)
File “C:\Program Files\lib\site-packages\gevent\server.py”, line 284, in _udp_socket
sock.bind(address)
File “C:\Program Files\lib\site-packages\gevent_socketcommon.py”, line 543, in bind
return self._sock.bind(address)
OSError: [WinError 10048] Only one usage of each socket address (protocol/network address/port) is normally permitted: (‘’, 9036)

2

Try changing the keyboard backend.

3

Thank you very much for your help! It’s working after changing the keyboard backend.