Import .OBJ python error

Last night I was working on a 3d model, but now when I try to import the .obj file in blender an error occurs and it doesn’t work.

http://i.imgur.com/2uyvdRY.png

I saved the project so I can still get the 3d model of the knife in blender, but I was wondering why this error occurs when I try to import the .obj file

Link to .obj file:

Try not using such an old out of date version of blender

Opens OK in v2.78 except for having inverted normala