title: Error When Activating Conda Environment Windows 10
body: <p>I just installed Anaconda3 and when I open the Anaconda command prompt, it shows me this error:</p>
  
  <pre><code>    # &gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt; ERROR REPORT &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;
  
      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=&lt;not set&gt;
                  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=&lt;not set&gt;
              SSL_CERT_FILE=&lt;not set&gt;
  
       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.
  </code></pre>
  
  <p>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.</p>
  
  <p>I tried uninstalling Anaconda and OpenSim and installing them again with no luck in resolving the issue. Any hint is appreciated.</p>