[Captain Kwok]

I've seen a similar issue in Adamant Mod when I've gone to refit ships. I have lots and lots of resources stored, but operating with a minerals defecit - although I am converting other resources to minerals for a "surplus". I notice only a few are successful and most are not due to lack of resources. This may be a result of how the turn executes and in what order different items are handled.

Also note that the message header for both successful and unsuccessful refits is the same (ugh) so you need to check each one to see what the problem is.