Hi, I am developing Plug-Ins for Vectorworks 2016. There were no greater issues while running a Python script in Vectorworks on a Windows 7 Machine. When I try to execute the same script on OS X, VW gives the error The following code is an extract with causes the error from tkinter import * window = Tk() window.title ('Plant') window.mainloop() Is this a known incompatibility? I consider editing the source of Tkinter but don't know what parameters argv shoud contain in VW on OS X. Thanks for taking your time.