error when generating g-code

[jwp-git]

I get the following:

Traceback (most recent call last):

File "laserHorizontal.py", line 3253, in

e.affect()     

File "C:\Program Files (x86)\Inkscape\share\extensions\inkex.py", line 268, in affect

self.effect()

it does not generate the g-code file...any insights into why this is happening? I am using inkscape .91

thanks...