Hello Bappo, I have to look into it. I'll test it this evening.

But the fishery should in any case start producing once you connect it to a canning factory. It does not depend on an input cargo. Here I think about a wrong type of station (passengers), tentacle not connected, station out of reach, or wrong type of vehicle.

The aluminium smelter needs aluminium ore AND a demand with connection to a final destination (->Cannery>FPP>Comm.Center>Town).

Both of factories are connected to a canning factory which is connected to food factory (it's only waiting for cans to work), stations are cargo type so they are ok, stations are right next to factories connected with roads and vehicles are good too, i checked it several times

Is your food factory connected to a commercial center, and the commercial center delivering to a town?

Yep everything is connected, the problem is the canning factory which won't start producing beacuse smeltery and fishery won't produce anything

Omg i've just noticed that i didnt build road near canning factory so it wasnt connected to a station, sorry for potential problems

No problem, I'm glad you found the cause. Have fun with the continuation of your game.