Mac OS 10.13.3 (17D102)
FileMaker Pro and Pro Adv 126.96.36.1990
Windows 10 Pro
FileMaker Pro and Pro Adv 188.8.131.523
Script instruction: Copy
the field to be copied in the layout is hidden (Hide object when = 1)
if you use the Copy instruction in a script, no problem.
if you set a button or a button in a button bar with the Single step action set to Copy there is the error 102 (Field is missing)