Or i got it. You have different optionVars on you machine in this version of scripts. It difers from previous version.
just paste this one time in python tab of script editor and press cntrl+enter: ================================ from pymel.core import *optionVar(fv=('ysvPaintCurveStep',…
A few bugs: When double clicking the shelf for the option box, I get: # Error: TypeError: file C:\apps\Autodesk\Maya2016.5\Python\lib\site-packages\pymel\internal\pmcmds.py line 134: Invalid arguments for flag 'v'. Expected int, got unicode # If multiple curves are drawn to the same poly surface, the start or end points…