Good evening. I can't run the notebook because of a "kernel error". I'll paste here the message. Can you help me? Thank you Traceback (most recent call last): File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\web.py", line 1713, in _execute result = await result File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\tasks.py", line 318, in __wakeup future.result() File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 776, in run yielded = self.gen.throw(*exc_info) # type: ignore File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\notebook\services\sessions\handlers.py", line 77, in post type=mtype)) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 769, in run value = future.result() File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 776, in run yielded = self.gen.throw(*exc_info) # type: ignore File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 98, in create_session kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 769, in run value = future.result() File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 776, in run yielded = self.gen.throw(*exc_info) # type: ignore File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 111, in start_kernel_for_session self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 769, in run value = future.result() File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\futures.py", line 181, in result raise self._exception File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\tasks.py", line 249, in __step result = coro.send(None) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 176, in start_kernel kernel_id = await maybe_future(self.pinned_superclass.start_kernel(self, **kwargs)) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 30, in wrapped raise e File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 27, in wrapped return loop.run_until_complete(future) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\nest_asyncio.py", line 89, in run_until_complete return f.result() File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\futures.py", line 181, in result raise self._exception File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\tasks.py", line 249, in __step result = coro.send(None) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\multikernelmanager.py", line 214, in _async_start_kernel starter = ensure_async(km.start_kernel(**kwargs)) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 30, in wrapped raise e File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 27, in wrapped return loop.run_until_complete(future) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\nest_asyncio.py", line 89, in run_until_complete return f.result() File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\futures.py", line 181, in result raise self._exception File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\tasks.py", line 249, in __step result = coro.send(None) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\manager.py", line 83, in wrapper raise e File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\manager.py", line 75, in wrapper out = await method(self, *args, **kwargs) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\manager.py", line 389, in _async_start_kernel await ensure_async(self._launch_kernel(kernel_cmd, **kw)) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 30, in wrapped raise e File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 27, in wrapped return loop.run_until_complete(future) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\nest_asyncio.py", line 89, in run_until_complete return f.result() File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\futures.py", line 181, in result raise self._exception File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\tasks.py", line 249, in __step result = coro.send(None) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\manager.py", line 307, in _async_launch_kernel connection_info = await self.provisioner.launch_kernel(kernel_cmd, **kw) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\provisioning\local_provisioner.py", line 204, in launch_kernel self.process = launch_kernel(cmd, **scrubbed_kwargs) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\launcher.py", line 170, in launch_kernel raise ex File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\launcher.py", line 158, in launch_kernel proc = Popen(cmd, **kwargs) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\subprocess.py", line 800, in __init__ restore_signals, start_new_session) File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\subprocess.py", line 1207, in _execute_child startupinfo) NotADirectoryError: [WinError 267] Nome di directory non valido

Hi Alessandro, When does this error appear, what portion of the code are you running? Just to be sure, did you install the required packages? Best, Nikola, 365 Team

Good morning. The error appears just when I open the notebook. Usually I have a different error ("not connected") that I already reported several times in the Q&A section of other courses, but nobody has ever helped me. This time I have this: When I click on "Kernel error", it gives me the message I pasted before. Yes, I have installed the required packages. Thanks

Hi Alessandro, I have no concrete solution to this problem, but to me it looks like some kind of problem with your environment. Maybe it wasn't installed and configured properly, or it is not selected as the environment in the notebook. So, try to reinstantiate a different environment and check for related issues. Here's an article I found on the internet about kernel errors, you can check it out: https://towardsdatascience.com/how-to-fix-kernel-error-in-jupyter-notebook-81619e195703#:~:text=A%20kernel%20error%20occurs%20basically,a%20specific%20version%20of%20Python Hope this was useful in some way, even though I couldn't help you with the problem directly! Best, Nikola, 365 Team

Maybe I have already tried with the procedure in that link, but I'll try again. Thank you

Good morning. I have tried it, but it gives me an error when I write "conda install ipykernel". I post the error here: Collecting package metadata (current_repodata.json): failed CondaSSLError: Encountered an SSL error. Most likely a certificate verification issue. Exception: HTTPSConnectionPool(host='repo.anaconda.com', port=443): Max retries exceeded with url: /pkgs/main/win-64/current_repodata.json (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available."))

I think I have solved the issue by myself (even if I already tried this solution in the past and it didn't work): the path name of the notebook I was using was too long, so I copied and pasted it in a shorter path and now the error has disappeared. In general, it could also be useful for someone with a "kernel error" to watch this video: https://www.youtube.com/watch?v=m0TLwkje6co&ab_channel=JonathanSoma