Can't build Infirmaries - Rise of Rome

[Balastulin]

I don't know whether this has been posted already, but recently when playing 'Rise of Rome' I found a number of my cities halted at Size 12 yet when I checked the production list, infirmary did not appear, even when a number of my other cities already had built infirmaries.

This may only have started after the 20 turn warning popped up.

Difficulty: Regent
Version: 1.00
Result: I won! with only 5 turns to go...

 

[Chieftess]

You know what I'm gonna ask for.

Do you have the game save?

 

[Balastulin]

Unfortunately I'm at work so will have to bring it in on a memory stick on Monday (after I've made sure I'm not being a total idiot!)