I was unable to research the tier 2 Trafalgar from Agosta. But were able to research Dover. I also able to reasearch the Nav from Simargl. When I was about to research the Trafalgar, it says "The reasearch requirement not met." AFAIK this can only happen when all modules of the previous ship has yet to be researched. But all modules in Agosta has been researched. So, am I missing something?
I posted the original topic in New Member portal. But it seems there are more people in General discussion. So I decided to repost my topic.