Make sure you're in "mm" mode - this code only runs in that mode. If you're in inches, pt, or cm mode, it won't work.
i'm in milimeter mode. that's why i'm founding it so confusing. anyway
this is print screen of my document properties
so i do some simple math (man know maths!)
my model is precisly 100mm long
gcode output from inkspace is 30mm long
ok, i'm morron. i didn't run notepad++ in administrator mode...