the error at startup is related to the maximum underground length
What version of the mod and game are you using? Any other mods active?
conflict with the pipe plus mod
I know why there is a problem and I sort of have a hack to fix it, but I can't deploy it as it's really not the proper way to fix it.
If you go into mr-pipes.lua and lr-pipes.lua, go to the line that says this: mr1.fluid_box.pipe_connections[2].max_underground_distance = mr1.fluid_box.pipe_connections[2].max_underground_distance*mr1r
Change the [2] to [1] for both instances and do the same in both files. I'll need to dig deeper into how to do this differently but basically the other mod changes the number of pipe_connections, I'm looking for the second one which contains the distance, but it's now the first one for some reason.