Error When Activating Conda Environment Windows 10 - windows

Question

I just installed Anaconda3 and when I open the Anaconda command prompt, it shows me this error:
# >>>>>>>>>>>>>>>>>>>>>> ERROR REPORT <<<<<<<<<<<<<<<<<<<<<<
Traceback (most recent call last):
File "C:\Users\owner\Anaconda3\lib\site-packages\conda\cli\main.py", line 138, in main
return activator_main()
File "C:\Users\owner\Anaconda3\lib\site-packages\conda\activate.py", line 996, in main
print(activator.execute(), end='')
File "C:\Users\owner\Anaconda3\lib\site-packages\conda\activate.py", line 180, in execute
return getattr(self, self.command)()
File "C:\Users\owner\Anaconda3\lib\site-packages\conda\activate.py", line 154, in activate
builder_result = self.build_activate(self.env_name_or_prefix)
File "C:\Users\owner\Anaconda3\lib\site-packages\conda\activate.py", line 288, in build_activate
return self._build_activate_stack(env_name_or_prefix, False)
File "C:\Users\owner\Anaconda3\lib\site-packages\conda\activate.py", line 314, in _build_activate_stack
conda_prompt_modifier = self._prompt_modifier(prefix, conda_default_env)
File "C:\Users\owner\Anaconda3\lib\site-packages\conda\activate.py", line 639, in _prompt_modifier
name=basename(prefix),
KeyError: 'openSim'
`$ C:\Users\owner\Anaconda3\Scripts\conda-script.py shell.cmd.exe activate C:\Users\owner\Anaconda3`
environment variables:
CIO_TEST=<not set>
CONDA_BAT=C:\Users\owner\Anaconda3\condabin\conda.bat
CONDA_EXE=C:\Users\owner\Anaconda3\condabin\..\Scripts\conda.exe
CONDA_ROOT=C:\Users\owner\Anaconda3
CONDA_SHLVL=0
GIT_LFS_PATH=C:\Program Files\Git LFS
HOMEPATH=\Users\owner
PATH=C:\Users\owner\Anaconda3;C:\Users\owner\Anaconda3\Library\mingw-w64\bi
n;C:\Users\owner\Anaconda3\Library\usr\bin;C:\Users\owner\Anaconda3\Li
brary\bin;C:\Users\owner\Anaconda3\Scripts;C:\Users\owner\Anaconda3\bi
n;C:\Users\owner\Anaconda3\condabin;C:\Users\owner\Documents\R\win-
library\3.3\Rtools\bin;C:\Program Files (x86)\Common
Files\Oracle\Java\javapath;C:\Program Files
(x86)\STMicroelectronics\st_toolset\asm;C:\Program Files
(x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\WINDOW
S\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\Win
dowsPowerShell\v1.0\;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:\Program Files\Microsoft SQL
Server\110\Tools\Binn\;C:\Program Files (x86)\Microsoft
SDKs\TypeScript\1.0\;C:\Program Files\Microsoft SQL
Server\120\Tools\Binn\;C:\Users\owner\.dnx\bin;C:\Program
Files\Microsoft DNX\Dnvm\;C:\Program Files\Microsoft SQL
Server\130\Tools\Binn\;C:\Program Files\nodejs\;C:\Program
Files\doxygen\bin;C:\Program Files\PuTTY\;C:\Program Files\Git
LFS;C:\Program Files\Git\cmd;C:\Program
Files\Git\mingw64\bin;C:\Program Files\Git\usr\bin;C:\WINDOWS\System32
\OpenSSH\;C:\Users\owner\Documents\Libraries\gradle-4.10.2\bin;C:\Andr
oid;C:\Windows\System32;C:\Users\owner\Anaconda3;C:\Users\owner\Anacon
da3\Scripts;C:\Users\owner\Anaconda3\Library\bin;C:\OpenSim 3.3\bin;C:
\Users\owner\Anaconda3;C:\Users\owner\Anaconda3\Library\mingw-w64\bin;
C:\Users\owner\Anaconda3\Library\usr\bin;C:\Users\owner\Anaconda3\Libr
ary\bin;C:\Users\owner\Anaconda3\Scripts;C:\Users\owner\AppData\Local\
Microsoft\WindowsApps;C:\Program Files (x86)\FCIV;C:\Users\owner\AppDa
ta\Roaming\npm;C:\Users\owner\Downloads\swigwin-3.0.12\swigwin-3.0.12\
;C:\Users\owner\AppData\Local\Google\Cloud SDK\google-cloud-
sdk\bin;MSVCP140.DLL;C:\Users\owner\AppData\Local\Programs\Microsoft
VS Code\bin;C:\flutter\bin;C:\Users\owner\AppData\Local\Android\Sdk\to
ols;C:\Users\owner\AppData\Local\Android\Sdk\platform-
tools;C:\Users\owner\AppData\Local\Android\Sdk\build-
tools\28.0.3;C:\Users\owner\AppData\Roaming\Pub\Cache\bin;C:\Program
Files (x86)\Microsoft Visual Studio\Installer
PROTOC_PATH=C:\Users\owner\Documents\Libraries\protobuf-3.3.0\src\protoc\Debug\pro
toc.exe
PSMODULEPATH=;C:\Users\owner\AppData\Local\Google\Cloud SDK\google-cloud-
sdk\platform\PowerShell
PYTHONIOENCODING=UTF-8
REQUESTS_CA_BUNDLE=<not set>
SSL_CERT_FILE=<not set>
active environment : None
shell level : 0
user config file : C:\Users\owner\.condarc
populated config files : C:\Users\owner\.condarc
conda version : 4.7.12
conda-build version : 3.18.9
python version : 3.7.4.final.0
virtual packages :
base environment : C:\Users\owner\Anaconda3 (writable)
channel URLs : https://repo.anaconda.com/pkgs/main/win-64
https://repo.anaconda.com/pkgs/main/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\owner\Anaconda3\pkgs
C:\Users\owner\.conda\pkgs
C:\Users\owner\AppData\Local\conda\conda\pkgs
envs directories : C:\Users\owner\Anaconda3\envs
C:\Users\owner\.conda\envs
C:\Users\owner\AppData\Local\conda\conda\envs
platform : win-64
user-agent : conda/4.7.12 requests/2.22.0 CPython/3.7.4 Windows/10 Windows/10.0.18362
administrator : False
netrc file : None
offline mode : False
An unexpected error has occurred. Conda has prepared the above report.
A similar error happens if I try to create a new environment and activate it. Any hint on what could be causing it? I see that that it's complaining about KeyError: 'openSim'. But I'm not sure what could be the root cause. The error message is not very explicit or at least I couldn't get anything from it.
I tried uninstalling Anaconda and OpenSim and installing them again with no luck in resolving the issue. Any hint is appreciated.

Answer 1

I found the solution to the problem which is so random that I thought I share it here. It's not easy (almost impossible) to figure out.
It looked like some configurations were cached and had to be manually deleted since even a fresh install of anaconda didn't resolve the issue.
I had to delete .condarc file in the anaconda directory to solve this issue.
For more info read this.