Quote Originally Posted by artavazd
i was playing as hayasdan. i did have trade in the black sea but not in the caspian i control aghvank, and adurbadakan on the caspian coast
I assume you are getting this info from looking at your city trade screens? Also, are there no little trade ships moving between your ports? And lastly, are there other factions (who you are at peace with) that have ports on the Caspian? If you don't know that last, then use the ~ key to bring up the command screen (the same key will make the screen disappear) and type in toggle_fow <enter> to reveal the whole map. You can rehide the map using the same command.