ToME: the Tales of Maj'Eyal

I have an armor that requires 20 strength. I have 12 base, 14 current.

I swapped out some items so that I have 20 (and then tried 23) strength. The only other requirement of the armor was a point in armor training, which I have. All requirements show green on mouseover.
But when I try to equip it I get a message saying not enough stats.

Do bonus stats from other equipment not count? Or is this a bug?

As of 1.30 you can no longer use equipped items to meet the prerequisite stats for other items.

Well to be exact, you cannot equip an item if the one it'll replace is required to get the needed stats.

You can still put on a necklace of +10 Str, put on that heavy armor, then remove the necklace and be fine with it.

I'm not sure it helps you here if it doesn't work with 23 strength, but for other people having similar problems: skills that give you bonus stats, especially as a percentage of other stats (e.g. the skeleton racial, Augmentation), are often buggy and give less stat than they display. Specifically, stat requirements round fractional stats differently than the stat display.

Percentage boosts should be all fixed now.