I'm having this issue while running any example in the SITL.

[septi00]

File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/_psosx.py", line 346, in wrapper
return fun(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/_common.py", line 480, in wrapper
raise raise_from(err, None)
^^^^^^^^^^^^^^^^^^^^^
File "", line 3, in raise_from
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/_common.py", line 478, in wrapper
return fun(self)
^^^^^^^^^
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/_psosx.py", line 373, in _get_kinfo_proc
ret = cext.proc_kinfo_oneshot(self.pid)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ProcessLookupError: [Errno 3] assume no such process (originated from sysctl(kinfo_proc), len == 0)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/init.py", line 361, in _init
self.create_time()
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/init.py", line 719, in create_time
self._create_time = self._proc.create_time()
^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/_psosx.py", line 346, in wrapper
return fun(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/_psosx.py", line 471, in create_time
return self._get_kinfo_proc()[kinfo_proc_map['ctime']]
^^^^^^^^^^^^^^^^^^^^^^
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/_psosx.py", line 351, in wrapper
raise NoSuchProcess(self.pid, self._name)
psutil.NoSuchProcess: process no longer exists (pid=23916)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/Users/user/PycharmProjects/pythonProject/venv/dronekit-python/examples/set_attitude_target/set_attitude_target.py", line 190, in
sitl.stop()
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/dronekit_sitl/init.py", line 388, in stop
kill(self.p.pid)
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/dronekit_sitl/init.py", line 33, in kill
process = psutil.Process(proc_pid)
^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/init.py", line 332, in init
self._init(pid)
File "/Users/user/PycharmProjects/pythonProject/venv/lib/python3.11/site-packages/psutil/init.py", line 373, in _init
raise NoSuchProcess(pid, msg='process PID not found')
psutil.NoSuchProcess: process PID not found (pid=23916)

This exact one occure while runnig the: set_attitude_target.py example

[hamishwillee]

This could be a SITL and Python3 issue. Do you have the same error if you connect to a normal simulator instance?

[TongBingda]

I think this may be due to a problem with your Python environment, have you tried Python 3.8 and below and tried to run your py file directly?