problem with inkscap

hello everybody
I have a litle problem with inkscap and gcodetools
I try to make a gcode and that say me this message
< Traceback (most recent call last):
File "/usr/share/inkscape/extensions/gcode_tools.py", line 41, in <module>
_ = inkex._
AttributeError: 'module' object has no attribute '_' >

Can somebody help me please???

ps excusme me for my english,I'm just a student