title: Getting DLL error with 'jupyter lab' command in Anaconda Installation
body: <p>Getting DLL error with 'jupyter lab' command in Anaconda Installation:</p>
  
  <p>Details for system:</p>
  
  <ul>
  <li>conda 4.5.11</li>
  <li>Python 3.7.0</li>
  <li>jupyter 4.4.0</li>
  </ul>
  
  <p>Height of weirdness is that I am able to launch jupyter lab from Anaconda Navigator, but '<strong>jupyter lab</strong>' is not working and throwing below exception:</p>
  
  <pre><code>Traceback (most recent call last):
    File "c:\ml\installed_tools\anaconda3\lib\runpy.py", line 193, in _run_module_as_main
      "__main__", mod_spec)
    File "c:\ml\installed_tools\anaconda3\lib\runpy.py", line 85, in _run_code
      exec(code, run_globals)
    File "C:\ML\installed_tools\anaconda3\Scripts\jupyter-lab.EXE\__main__.py", line 5, in &lt;module&gt;
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\jupyterlab\labapp.py", line 12, in &lt;module&gt;
      from jupyterlab_server import slugify, WORKSPACE_EXTENSION
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\jupyterlab_server\__init__.py", line 4, in &lt;module&gt;
      from .app import LabServerApp
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\jupyterlab_server\app.py", line 9, in &lt;module&gt;
      from .server import ServerApp
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\jupyterlab_server\server.py", line 32, in &lt;module&gt;
      from jupyter_server.serverapp import ServerApp, aliases, flags      # noqa
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\jupyter_server\serverapp.py", line 46, in &lt;module&gt;
      from zmq.eventloop import ioloop
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\zmq\__init__.py", line 47, in &lt;module&gt;
      from zmq import backend
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\zmq\backend\__init__.py", line 40, in &lt;module&gt;
      reraise(*exc_info)
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise
      raise value
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\zmq\backend\__init__.py", line 27, in &lt;module&gt;
      _ns = select_backend(first)
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\zmq\backend\select.py", line 27, in select_backend
      mod = __import__(name, fromlist=public_api)
    File "c:\ml\installed_tools\anaconda3\lib\site-packages\zmq\backend\cython\__init__.py", line 6, in &lt;module&gt;
      from . import (constants, error, message, context,
  ImportError: DLL load failed: The specified module could not be found.
  </code></pre>