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I am a newbie to python. I am getting the below error in Kernel while opening jupyter notebook. Any ideas how I can resolve it? Installation of jupyter has been done via Anaconda3 - tried reinstalling and setting environment variables, but no luck so far. Any help would be greatly appreciated.

 Traceback (most recent call last): File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\tornado\web.py", line 1699, in _execute result = await result File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 742, in run yielded = self.gen.throw(*exc_info) # type: ignore File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\notebook\services\sessions\handlers.py", line 72, in post type=mtype)) File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 735, in run value = future.result() File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 742, in run yielded = self.gen.throw(*exc_info) # type: ignore File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\notebook\services\sessions\sessionmanager.py", line 88, in create_session kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name) File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 735, in run value = future.result() File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 742, in run yielded = self.gen.throw(*exc_info) # type: ignore File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\notebook\services\sessions\sessionmanager.py", line 101, in start_kernel_for_session self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name) File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 735, in run value = future.result() File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\tornado\gen.py", line 209, in wrapper yielded = next(result) File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\notebook\services\kernels\kernelmanager.py", line 168, in start_kernel super(MappingKernelManager, self).start_kernel(**kwargs) File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\jupyter_client\multikernelmanager.py", line 110, in start_kernel km.start_kernel(**kwargs) File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\jupyter_client\manager.py", line 240, in start_kernel self.write_connection_file() File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\jupyter_client\connect.py", line 547, in write_connection_file kernel_name=self.kernel_name File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\jupyter_client\connect.py", line 212, in write_connection_file with secure_write(fname) as f: File "C:\Users\drag88\Anaconda3\lib\contextlib.py", line 112, in __enter__ return next(self.gen) File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\jupyter_client\connect.py", line 100, in secure_write win32_restrict_file_to_user(fname) File "C:\Users\drag88\AppData\Roaming\Python\Python37\site-packages\jupyter_client\connect.py", line 53, in win32_restrict_file_to_user import win32api ImportError: DLL load failed: The specified procedure could not be found.
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7 Answers 7

Reset to default
6
  • Step 2 command: conda activate (location of your env folder)
  • Step 3 command: python -m ipykernel install --user

Works for Windows.

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It looks like you had installed jupyter when there was an issue with its dependencies on Windows. See https://github.com/jupyterlab/jupyterlab/issues/7259 . I ran into the same error.

It should be fixed on conda now, so if you uninstall and reinstall jupyterlab from conda, it should not throw that error anymore.

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I battled to get Jupyter working on my Windows 10 office computer for a number of hours. This was after installing Anaconda3. I had versions of Python 2 and 3 installed before. I was getting 'Kernel error' and also had various errors about 'win32api' and 'tornado'

I did many things but in the end main ones that, I think, helped are listed below -

On install, Anaconda3 created a data folder here -

C:\ProgramData\Anaconda3

I gave my user account access to write to this folder, I am not sure if it made a difference.

Elevated to admin, I copied two dll files as below -

pythoncom39.dll pywintypes39.dll

From -

C:\ProgramData\Anaconda3\Lib\site-packages\pywin32_system32

To -

C:\windows\system32

At the 'Anaconda Prompt', a Windows cmd screen (which was added to my start menu) after the install, I did this -

(base) C:\>conda env create test-env

It created 'test-env' folder at C:\Users\{windows user name}\.conda\envs\test-env

(base) C:\>conda activate "C:\Users\{windows user name}\.conda\envs\test-env"

(test-env) C:\>

Once in this newly created environment, I tried various other things such as these -

conda install jupyter conda install pywin32 python -m ipykernal install --user

Launching jupyter after loading and setting to this environment now works by using this command -

(test-env) C:\>jupyter notebook

When browser opens, select New>python 3 (ipykernel) from right hand menu to create new notebook.

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If you have Python installed on your pc run from cmd or powershell:

pip install jupyterlab

Then you can start it with:

jupyter lab
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The installation might have missed some steps which are fixed by post_install. Go to yout venv's Script directory and run the command

python .\pywin32_postinstall.py -install

Make sure you are running the shell with Admin rights.

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This error is sometimes as a result of the deleted environment that was created before. For Windows users, run the following code in cmd

python -m ipykernel install –user

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Simply uninstall and install jupyter by first: #Activate your environment in anaconda prompt (conda activate"path") and then type:-

  1. conda uninstall jupyter
  2. conda install jupyter
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