Lunching jupyter notebook form cmd i face this problem, how to fix it?

[MuhammadAsadJaved]

Traceback (most recent call last):
  File "C:\Anaconda3\Scripts\jupyter-notebook-script.py", line 3, in <module>
    import notebook.notebookapp
  File "C:\Anaconda3\lib\site-packages\notebook\notebookapp.py", line 72, in <module>
    from .base.handlers import Template404, RedirectWithParams
  File "C:\Anaconda3\lib\site-packages\notebook\base\handlers.py", line 42, in <module>
    sys_info = json.dumps(get_sys_info())
  File "C:\Anaconda3\lib\site-packages\notebook\_sysinfo.py", line 94, in get_sys_info
    return pkg_info(path)
  File "C:\Anaconda3\lib\site-packages\notebook\_sysinfo.py", line 76, in pkg_info
    src, hsh = pkg_commit_hash(pkg_path)
  File "C:\Anaconda3\lib\site-packages\notebook\_sysinfo.py", line 52, in pkg_commit_hash
    cwd=pkg_path, shell=True)
  File "C:\Anaconda3\lib\subprocess.py", line 707, in __init__
    restore_signals, start_new_session)
  File "C:\Anaconda3\lib\subprocess.py", line 990, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

[takluyver]

It sounds like you've got quite an old version of the notebook - this should have been fixed in version 5.1, by PR #2471. Try upgrading.

[MuhammadAsadJaved]

Ok Thank you very much @takluyver