Wrong and confusing error message.
Earlier I reported(and forgot to put it in the proper template, sorry) a supposed bug about being unable to switch to scholar.
However, it was not really a bug (since the change was prevented by my equipped weapon... should have seen that... I was too tired I suppose).
The error message however is quite confusing:
"Cannot change job to scholar from arcanist. You must first switch your class to arcanist."
The error message should instead state:
"Cannot change job to scholar, you must first switch your weapon to one that can be wielded by a scholar."