Activating Python 3.7.3 64-bit ('base': conda) to run Jupyter failed with Error: Command failed

Another person has reported a similar problem on Unix. To make sure that my setup is not corrupted, I have uninstalled Conda, Anaconda, VSCode, and all related files, directories, and registry keys, and reinstalled it. I have reinstalled the latest versions as of now. I did not have this issue before at all. It has appeared after the latest VSCode update. I have not made any changes to any configs and accepted all defaults while installing Anaconda. I installed VSCode via Anaconda. I am using Windows 10.

I am teaching a Python class using VSCode and all my students are having the same problem.

Activating Python 3.7.3 64-bit ('base': conda) to run Jupyter failed with Error: Command failed: C:/Users/dgode/Miniconda3/Scripts/activate && conda activate base && echo 'e8b39361-0157-4923-80e1-22d70d46dee6' && python C:/Users/dgode/.vscode/extensions/ms-python.python-2019.3.6352/pythonFiles/printEnvVariables.py

ERROR REPORT

Traceback (most recent call last):
  File "C:\Users\dgode\Miniconda3\lib\site-packages\conda\cli\main.py", line 138, in main
    return activator_main()
  File "C:\Users\dgode\Miniconda3\lib\site-packages\conda\activate.py", line 940, in main
    print(activator.execute(), end='')
  File "C:\Users\dgode\Miniconda3\lib\site-packages\conda\activate.py", line 173, in execute
    return getattr(self, self.command)()
  File "C:\Users\dgode\Miniconda3\lib\site-packages\conda\activate.py", line 150, in activate
    builder_result = self.build_activate(self.env_name_or_prefix)
  File "C:\Users\dgode\Miniconda3\lib\site-packages\conda\activate.py", line 275, in build_activate
    return self._build_activate_stack(env_name_or_prefix, False)
  File "C:\Users\dgode\Miniconda3\lib\site-packages\conda\activate.py", line 297, in _build_activate_stack
    return self.build_reactivate()
  File "C:\Users\dgode\Miniconda3\lib\site-packages\conda\activate.py", line 442, in build_reactivate
    new_path = self.pathsep_join(self._replace_prefix_in_path(conda_prefix, conda_prefix))
  File "C:\Users\dgode\Miniconda3\lib\site-packages\conda\activate.py", line 550, in _replace_prefix_in_path
    assert last_idx is not None
AssertionError

$ C:\Users\dgode\Miniconda3\Scripts\conda-script.py shell.cmd.exe activate

environment variables:
CIO_TEST=
CONDA_DEFAULT_ENV=base
CONDA_EXE=C:\Users\dgode\Miniconda3\condabin..\Scripts\conda.exe
CONDA_PREFIX=C:\Users\dgode\Miniconda3
CONDA_PROMPT_MODIFIER=(base)
CONDA_ROOT=C:\Users\dgode\Miniconda3
CONDA_SHLVL=1
HOMEPATH=\Users\dgode
PATH=C:\Users\dgode\Miniconda3;C:\Users\dgode\Miniconda3\Library\mingw-w64
bin;C:\Users\dgode\Miniconda3\Library\usr\bin;C:\Users\dgode\Miniconda
3\Library\bin;C:\Users\dgode\Miniconda3\Scripts;C:\Users\dgode\Minicon
da3\bin;C:\Users\dgode\Miniconda3\condabin;C:\Users\dgode\Miniconda3;C
:\Users\dgode\Miniconda3\Library\mingw-w64\bin;C:\Users\dgode\Minicond
a3\Library\usr\bin;C:\Users\dgode\Miniconda3\Library\bin;C:\Users\dgod
e\Miniconda3\Scripts;C:\Program Files (x86)\Intel\iCLS
Client;C:\Program Files\Intel\iCLS Client;C:\WINDOWS\system32;C:\WIN
DOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1
.0;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-
Static;C:\Program Files (x86)\Intel\Intel(R) Management Engine
Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine
Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine
Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine
Components\IPT;C:\WINDOWS\System32\OpenSSH;C:\Program
Files\PuTTY;C:\Users\dgode\AppData\Local\Microsoft\WindowsApps
PSMODULEPATH=C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\Windows
PowerShell\v1.0\Modules;C:\Program Files\Intel
PYTHONIOENCODING=utf-8
PYTHONUNBUFFERED=1
REQUESTS_CA_BUNDLE=
SSL_CERT_FILE=

 active environment : base
active env location : C:\Users\dgode\Miniconda3
        shell level : 1
   user config file : C:\Users\dgode\.condarc

populated config files : C:\Users\dgode.condarc
conda version : 4.6.11
conda-build version : not installed
python version : 3.7.3.final.0
base environment : C:\Users\dgode\Miniconda3 (writable)
channel URLs : https://repo.anaconda.com/pkgs/main/win-64
https://repo.anaconda.com/pkgs/main/noarch
https://repo.anaconda.com/pkgs/free/win-64
https://repo.anaconda.com/pkgs/free/noarch
https://repo.anaconda.com/pkgs/r/win-64
https://repo.anaconda.com/pkgs/r/noarch
https://repo.anaconda.com/pkgs/msys2/win-64
https://repo.anaconda.com/pkgs/msys2/noarch
package cache : C:\Users\dgode\Miniconda3\pkgs
C:\Users\dgode.conda\pkgs
C:\Users\dgode\AppData\Local\conda\conda\pkgs
envs directories : C:\Users\dgode\Miniconda3\envs
C:\Users\dgode.conda\envs
C:\Users\dgode\AppData\Local\conda\conda\envs
platform : win-64
user-agent : conda/4.6.11 requests/2.21.0 CPython/3.7.3 Windows/10 Windows/10.0.17763
administrator : False
netrc file : None
offline mode : False

An unexpected error has occurred. Conda has prepared the above report.

If submitted, this report will be used by core maintainers to improve future releases of conda. Would you like conda to send this report to the core maintainers?

.

[DonJayamanne]

@dangode I’m sorry about these issues. Over the next few days (hopefully tomorrow), I’ll be spending time to look into the issues related to Conda + VS Code. Hopefully I can get to the bottom of this.

Once again, I’m sorry about these issues & understand for not wanting to install anything with the fear of breaking things.

[DonJayamanne]

Now both the command window and the interactive window are working. However, I am afraid to install anything else because it might break the install again.

closing as the issue has been resolved and we’re tracking conda related issues here #5344