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### 環境

Windows 10 Home 1803  
PowerShell 5.1.17134.590  
Chocolatey v0.10.11  
conda 4.6.11

### 質問詳細

ChocolateyでインストールしたMiniconda3をPowershellで使いたいのですが、仮想環境の切り替えでエラーが出て困っています。  
`conda init powershell`は実行しました。

### 仮想環境一覧

```

    (base) PS C:\Windows\system32> conda info -e
    WARNING: The conda.compat module is deprecated and will be removed in a future release.
    # conda environments:
    #
    base                  *  C:\tools\miniconda3
    dj                       C:\tools\miniconda3\envs\dj
    dj-test                  C:\tools\miniconda3\envs\dj-test
    django-tutrial           C:\tools\miniconda3\envs\django-tutrial
    pt-test                  C:\tools\miniconda3\envs\pt-test
    pytorch-gpu              C:\tools\miniconda3\envs\pytorch-gpu
    
    (base) PS C:\Windows\system32>
    
```

### エラー内容

```

    (base) PS C:\Windows\system32> conda activate dj
    
    # >>>>>>>>>>>>>>>>>>>>>> ERROR REPORT <<<<<<<<<<<<<<<<<<<<<<
    
        Traceback (most recent call last):
          File "C:\tools\miniconda3\lib\site-packages\conda\cli\main.py", line 138, in main
            return activator_main()
          File "C:\tools\miniconda3\lib\site-packages\conda\activate.py", line 940, in main
            print(activator.execute(), end='')
          File "C:\tools\miniconda3\lib\site-packages\conda\activate.py", line 173, in execute
            return getattr(self, self.command)()
          File "C:\tools\miniconda3\lib\site-packages\conda\activate.py", line 150, in activate
            builder_result = self.build_activate(self.env_name_or_prefix)
          File "C:\tools\miniconda3\lib\site-packages\conda\activate.py", line 275, in build_activate
            return self._build_activate_stack(env_name_or_prefix, False)
          File "C:\tools\miniconda3\lib\site-packages\conda\activate.py", line 332, in _build_activate_stack
            self._replace_prefix_in_path(old_conda_prefix, prefix))
          File "C:\tools\miniconda3\lib\site-packages\conda\activate.py", line 550, in _replace_prefix_in_path
            assert last_idx is not None
        AssertionError
    
    `$ C:\tools\miniconda3\Scripts\conda-script.py shell.powershell activate dj`
    
      environment variables:
                     CIO_TEST=<not set>
            CONDA_DEFAULT_ENV=base
                    CONDA_EXE=C:\tools\miniconda3\Scripts\conda.exe
                 CONDA_PREFIX=C:\tools\miniconda3
        CONDA_PROMPT_MODIFIER=(base)
                   CONDA_ROOT=C:\tools\miniconda3
                  CONDA_SHLVL=1
                    CUDA_PATH=C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.0
                     HOMEPATH=\Users\take
                    NODE_PATH=C:\Program Files (x86)\Nodist\bin\node_modules;C:\Program Files
                              (x86)\Nodist\bin\node_modules;%NODE_PATH%
              NVTOOLSEXT_PATH=C:\Program Files\NVIDIA Corporation\NvToolsExt\
                         PATH=C:\tools\miniconda3;C:\tools\miniconda3\Library\mingw-w64\bin;C:\tools
                              \miniconda3\Library\usr\bin;C:\tools\miniconda3\Library\bin;C:\tools\m
                              iniconda3\Scripts;C:\tools\miniconda3\bin;C:\tools\miniconda3\condabin
                              ;C:\Program Files\NVIDIA GPU Computing
                              Toolkit\CUDA\v10.0\bin;C:\Program Files\NVIDIA GPU Computing
                              Toolkit\CUDA\v10.0\libnvvp;C:\Program Files (x86)\Common
                              Files\Oracle\Java\javapath;C:\Program Files (x86)\Intel\Intel(R)
                              Management Engine Components\iCLS\;C:\Program Files\Intel\Intel(R)
                              Management Engine Components\iCLS\;C:\Windows\system32;C:\Windows;C:\W
                              indows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Wi
                              ndows\System32\OpenSSH\;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)\NVIDIA
                              Corporation\PhysX\Common;C:\ProgramData\chocolatey\bin;C:\Program
                              Files\Microsoft VS Code\bin;C:\Program Files\Git\cmd;C:\tools\minicond
                              a3\;C:\tools\miniconda3\Scripts;C:\tools\php73;C:\Program Files (x86)\
                              Nodist\bin;C:\Users\take\AppData\Local\Microsoft\WindowsApps;C:\Users\
                              take\AppData\Local\GitHubDesktop\bin;C:\ProgramData\chocolatey\lib\min
                              gw\tools\install\mingw64\bin;C:\tools\miniconda3\lib\site-
                              packages\pywin32_system32;C:\tools\miniconda3\lib\site-
                              packages\pywin32_system32
                 PSMODULEPATH=C:\Users\take\Documents\WindowsPowerShell\Modules;C:\Program Files\Win
                              dowsPowerShell\Modules;C:\Windows\system32\WindowsPowerShell\v1.0\Modu
                              les
           REQUESTS_CA_BUNDLE=<not set>
                SSL_CERT_FILE=<not set>
    
         active environment : base
        active env location : C:\tools\miniconda3
                shell level : 1
           user config file : C:\Users\%username%\.condarc
     populated config files : C:\Users\%username%\.condarc
              conda version : 4.6.11
        conda-build version : not installed
             python version : 3.7.3.final.0
           base environment : C:\tools\miniconda3  (writable)
               channel URLs : https://conda.anaconda.org/conda-forge/win-64
                              https://conda.anaconda.org/conda-forge/noarch
                              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:\tools\miniconda3\pkgs
                              C:\Users\%username%\.conda\pkgs
                              C:\Users\%username%\AppData\Local\conda\conda\pkgs
           envs directories : C:\tools\miniconda3\envs
                              C:\Users\%username%\.conda\envs
                              C:\Users\%username%\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/10.0.17134
              administrator : True
                 netrc file : None
               offline mode : False
    
    
    An unexpected error has occurred. Conda has prepared the above report.
    
    Invoke-Expression : 引数が空の文字列であるため、パラメーター 'Command' にバインドできません。
    発生場所 C:\tools\miniconda3\shell\condabin\Conda.psm1:70 文字:36
    +         Invoke-Expression -Command $activateCommand;
    +                                    ~~~~~~~~~~~~~~~~
        + CategoryInfo          : InvalidData: (:) [Invoke-Expression]、ParameterBindingValidationException
        + FullyQualifiedErrorId : ParameterArgumentValidationErrorEmptyStringNotAllowed,Microsoft.PowerShell.Commands.InvokeExpressionCommand
    
    (base) PS C:\Windows\system32>
    
```
CC BY-SA 4.0
2019-04-25T11:37:54.657
54477
2021-06-12T11:21:50.323
2021-06-12T11:21:50.323
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11053
question
python python3 powershell chocolatey miniconda
ChocolateyでインストールしたMiniconda3をPowershellで使いたいが仮想環境切替できない
以下のコマンドで conda をバージョンアップすることで解決しました。

```

    conda update conda -n base -c default
    
```
CC BY-SA 4.0
2019-04-25T14:38:35.890
54480
2021-06-12T11:20:53.213
2021-06-12T11:20:53.213
3060
11053
54477
answer