Hi vlau!
I'm fairly certain this isn't a problem with any of my scripts... When I copied all of my files and tried them on an installation on my other computer, they worked fine.
I'm seeing this also in MED simply when I open any of my models and click on engine preview, then hit "0" to move around, this error pops up; AFAIK, there are no scripts attached to MED other than what Conitec wrote... That's what's making this so baffling.