Windows 7 Error

[Grafs]

Run succss in command line
Return:

Traceback (most recent call last):
  File "C:\Users\Oleg\AppData\Roaming\npm\\node_modules\succss\bin\succss.py", line 25, in <module> call(requiredArgs)
  File "c:\Program Files\Python 2.7\Lib\subprocess.py", line 522, in call return Popen(*popenargs, **kwargs).wait()
  File "c:\Program Files\Python 2.7\Lib\subprocess.py", line 710, in __init__errread, errwrite)
  File "c:\Program Files\Python 2.7\Lib\subprocess.py", line 958, in _execute_child startupinfo)
WindowsError: [Error 2]

How to solve a problem?