It doesn't work, maybe impossible?!

[FlawlessHappiness]

Try with another entity, like a grunt or a book, maybe that bookshelf can't be set disabled.

I don't believe that. He wasn't super specific, but he used 2 shelves (which I guess are the same type of entity). If one starts active, and another one inactive, both would be active if they couldn't be disabled.

Then that would've been the problem, and not the script, which I think he would've said if that was the case... But eh, if nothing works, do try it with another entity!

I just find it a waste of effort, if it's obvious that is not the case