Thanks for the fast response. In that case could I suggest a feature:

Don't show the little yellow outline for the pump destination, if the train cannot be unloaded. That would be quite helpful!

Hi,

Generally I do not have trouble with this, but I am encountering some trains that just will not load/unload fluids. I am playing with the pyanodon mods, so that might be part of the issue but I thought I should report anyway.

I've attached my save. The train the character is standing in front ...