golang appengine

C:\Users\praktikant\Desktop\google_appengine>dev_appserver.py gopath/myapp/
INFO     2013-07-16 10:43:17,565 sdk_update_checker.py:244] Checking for updates
 to the SDK.
INFO     2013-07-16 10:43:18,779 sdk_update_checker.py:288] This SDK release is
newer than the advertised release.
WARNING  2013-07-16 10:43:18,799 api_server.py:314] Could not initialize images
API; you are likely missing the Python "PIL" module.
INFO     2013-07-16 10:43:18,815 api_server.py:138] Starting API server at: http
://localhost:51413
INFO     2013-07-16 10:43:18,825 api_server.py:509] Applying all pending transac
tions and saving the datastore
INFO     2013-07-16 10:43:18,828 api_server.py:512] Saving search indexes
Traceback (most recent call last):
  File "C:\Users\praktikant\Desktop\google_appengine\dev_appserver.py", line 182
, in <module>
    _run_file(__file__, globals())
  File "C:\Users\praktikant\Desktop\google_appengine\dev_appserver.py", line 178
, in _run_file
    execfile(script_path, globals_)
  File "C:\Users\praktikant\Desktop\google_appengine\google\appengine\tools\deva
ppserver2\devappserver2.py", line 695, in <module>
    main()
  File "C:\Users\praktikant\Desktop\google_appengine\google\appengine\tools\deva
ppserver2\devappserver2.py", line 688, in main
    dev_server.start(options)
  File "C:\Users\praktikant\Desktop\google_appengine\google\appengine\tools\deva
ppserver2\devappserver2.py", line 663, in start
    self._dispatcher.start(apis.port, request_data)
  File "C:\Users\praktikant\Desktop\google_appengine\google\appengine\tools\deva
ppserver2\dispatcher.py", line 161, in start
    servr.start()
  File "C:\Users\praktikant\Desktop\google_appengine\google\appengine\tools\deva
ppserver2\server.py", line 936, in start
    self._watcher.start()
  File "C:\Users\praktikant\Desktop\google_appengine\google\appengine\tools\deva
ppserver2\file_watcher.py", line 37, in start
    watcher.start()
  File "C:\Users\praktikant\Desktop\google_appengine\google\appengine\tools\deva
ppserver2\win32_file_watcher.py", line 74, in start
    raise ctypes.WinError()
WindowsError: [Error 6] The handle is invalid