Quote Originally Posted by Slaists View Post
Could it be that 1) you do not produce anything they need/lack at the time; 2) their trade routes are blocked?

I usually see everyone I have agreements with in my list though.
1) No. You still sell generic trade goods
2) No. You will see a trade route but is blocked.

I have had the same experience. I was traiding with countries according to the diplomatic sreen which didn't show up in the trade screen.