Click the pipe and it'll show you what it contains, and will allow you to flush the bad stuff. Use that as your warning and then check the pipes to find out where that bad fluid came from. I assume that's what @Loewchen did. It's what I'd have done That's what made it confusing. When you click on e...

Thank you, I never would have found that, the refinery would have sat there the rest of the game doing nothing. It seems like it should prevent invalid refinery orientations the same way it prevents invalid pipe placements, or at least pop up a warning in such a situation. At least it's much better ...

I have two systems which have crude oil, have never had anything else, used to be in the same system, but now I get the error "Cannot connect systems with different fluids" when I try to join them together again. I am not running any mods. How I got in this situation: I had two crude stora...