everytime i build and open console this error shows up :

Traceback (most recent call last):
File “.\sublime_plugin.py”, line 257, in run_
File “.\exec.py”, line 113, in run
File “.\ntpath.py”, line 205, in dirname
File “.\ntpath.py”, line 170, in split
File “.\ntpath.py”, line 125, in splitdrive
TypeError: ‘NoneType’ object is unsubscriptable

im using windows 7 any solutions ?