From: Bexhill-on-Sea, E Sussex
ORIGINAL: Chris H
Air unit would not upgrade.
Mandalay had no damage, 20,000+ supply, level 8 a/f, not cut off, enough a/c and air Hq in same base. It is the turn after and it has now upgraded automatically and I still don't know why it would do it manually.
The only difference that I can see between the upgrade requirements and the turn prior to the problem occurring is the base only had 14K supply. I boosted the supply required by 25,000 which has, as you can see in the pic, increased supply 20.4K. Now this should be enough but wasn't. I left the unit set to upgrade and with the supply boost increasing supply to over 22K the unit did upgrade to 42 Tony the next turn.
I'm surmising here but it's the only thing that fits. There are two supply phases per turn. If some kind base supply check is made after the first one and supply is not over 20K then a flag is set. Now if this check is not repeated after the second supply phase then the upgrade button will be greyed out. This is a guess.
The above is taken from a thread I started in the general forum, it was put there because I thout I was missing something. After various suggestion in appears there should be no reason for the unit (any unit in the base as I tried others) not to upgrade. Unfortunately I do not have a save as I've subsequently overwriten it but theses are my thoughts as to why it happened.