I have had three colonists training in my university in Cayenne. Two joined simultaneously ~10 turns ago, and the third joined ~6 turns ago.

However, they will not graduate! For the past 3-4 turns, hovering over their pictures in the city screen tells me "Graduation in 0 turns", but the game never actually lets them *graduate*.

There are specialists in the city, and I have more than enough gold to pay their graduation fees, so I can't determine the cause. I've attached the relevant save, the colonists in question are the three students in Cayenne.

Are you training in other cities? That can have an impact.

The unofficial patch does fix this so multiple colonists can graduate per turn correctly. :)

No, that's the only city that's training anyone. But if there is a bug with multiple colonists graduating per turn, then that's probably what I've run into.

*sigh*

You can workaround this one by getting the colonist off the city, then putting it back (in your school/college/uni). It will graduate on the very next turn.