"can't unmothball"??

[geoschmo]

Are you doing any other retofits/unmothballs the same turn? You could be depleting your resources below the level needed for this particular unmothball, and then your new resources come in at the end of the turn after the unmothball order fails.

Also, you have plenty of all three resources? It's not failing because you have plenty of minerals, but are out of rads is it?

If it's not one of those two, I don't know. I could take a look if you want if it's not a game we are in together.