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I made a train stop that both loads and unloads a train of fluid tankers (so the train can deliver oil when the local oil patch runs low). It works fine. I made a copy (Ctrl-C) of the trains providing water and crude oil, and pasted it for the next refinery, but in the copy, only half the pumps work. I added acid production, which loads the acid train as expected, but nothing at all happens when I go to transfer the acid from the warehouse to the (first) customer: In all cases, the trains are on straight tracks, not coming in off a curve. All the trains are actively following the schedule directing them to stop at the current station. There are no circuit conditions in effect, and none of the trains are trying to leave the station. There are no more than three pumps per fluid tanker. All the pumps have power.

The second last picture shows an output pump being connected to the part the input would connect to, blocking it. The setup at the last picture just does not work, you need a second fluid box connected to a pump for it to become one that can connect to trains.

Loewchen wrote: Wed Jun 09, 2021 11:49 pm The second last picture shows an output pump being connected to the part the input would connect to, blocking it.

Sorry I am not clear on what is being blocked. And if there is a design problem, why does it work in the first case but not the second? Hang on I think I get it: in the first case, the train is loading but not unloading, it is just hidden because the train fully loaded before I got the unloading side built, and the unloading tanks are all joined.

Loewchen wrote: Wed Jun 09, 2021 11:49 pm The setup at the last picture just does not work, you need a second fluid box connect to a pump for it to become one that can connect to trains.

So it has to be tanker->pump->pipe(s) or tank(s)->pump->tanker? Perhaps this could be added to the wiki.

Thanks so much for the instant response! You guys are amazing!

Amarula wrote: Wed Jun 09, 2021 11:55 pm So it has to be tanker->pump->pipe(s) or tank(s)->pump->tanker? Perhaps this could be added to the wiki.

A second pump already works, so Tanker-Pump-Pump-Tanker.