Schwimmdock is the endpoint of the yardchain and can´t get any consumers.
In Version 0.9 the chain is complete, in my testgames it works.
Except PC-Fab this suppliers should exist also in earlier pak-versions. Hope in your games the needed supplier will spawn later.
In my own games(not very much, most of the time I need for job and new ST-objects
) the spawned yardchain used some existing factories and non existing spawn together with yard and Schwimmdock.
The yardchain is large, many factories needed for the complete chain (>30factories at all). Maybe, if you start a new game, and the number of factories and shops is set to low, the game can´t set all the needed factories.
But I know a bug in yard and swimdock: Can´t get any passengers from both. I have to read the .dat from the oilrig, there passenger-transport works. /done - In my "developer edition" pax and mail for yard and swimdock is now enabled.