sorry guys. the format changed a little in 2016. 2015 files load in 2016, but not the other way around. but its totally fine to remove that ParentMaterial line with a text editor if that makes it work. maybe you can provide a separate 2015 version that way?
Google says it didn't happen last year, to the search query's knowledge. https://www.google.com/search?q=Allegorithmic+Christmas+sale+2016&rlz=1C1GIWA_enUS570US570&oq=Allegorithmic+Christmas+sale+2016&aqs=chrome..69i57.9808j1j7&sourceid=chrome&ie=UTF-8
In Maya 2017 work perfect. In Maya 2016 error: # Error: TypeError: file C:\Program Files\Autodesk\Maya2016\Python\lib\site-packages\pymel\internal\pmcmds.py line 133: Invalid flag 'oo' # Thx for the script. Im use 2016.