Can't switch back to Scholar from Summoner after using job boost item

[Neroshii]

Yes. I used to switch back and forth easily, but now I can't. Just get errors.

Edit: Neeeevermind. I was stupid and didn't remember to swap my books. Durhurhur. :B

IGNORE ME PLEASE FOR I AM DUMB. I tried changing the books out and it worked. Funny how it didn't work from the gear sets before, though. OH WELL I CAN DO IT NOW.