Factorio Forums

When redoing the connection from my oil refinery pipe-system with my tank pipe-system both with light oil, I get the message "Cannot connect systems with different fluids". See first sceenshot.
I cleand one system (refinery-system) and I still cannot connect the pipes.
I think ther is a different type of light oil in the tank-system, because I get the same message when connecting the refinery to the tank-system. See second screenshot.
I guess I need to empty all my light oil to solve this issue for my save.

The refinery-system and tank-system was built in 1.1.6.

Addition:
I disconnected a part of the tank-system and was not able to connect it any more. I cannot connect the tank-system to the existing pipes of my chemical plants (light oil cracking).
Addition2:
Redoing the pipes to light oil cracking worked so I can consume the light oil
Addition3:
Cleaning both systems from all fluids and I can still not connect them.

You have different fluid boxes connected. If you can not find it yourself post the save and someone will find it for you.

Just use bots to connect them.

Redoing all the piping I figured out that I had chemical plants with output of Petrolium Gas connected (built by robots).

Maybe a better error message is possible in this case?
Otherwise, problem solved.