ISRU not filling tanks on docked vessels

[Zefnoly]

I have crew manifest and a couple of parts mods from Nertea like restock, Far future, all of near future, cryogenic fuel, kerbal atomics.

I have made a base on the surface of Mun with help of simple construction using docking ports to put modules together as this is a rather large expandable base.

I made an identical looking base in an older game I did once in an earlier version of KSP with the exact same mods and I never encountered this issue.

The problem is that my ISRU refinery module refuse to directly fill up oxidizer and liquid fuel on tanks on other docked modules on the base. I have tried to rebuild the entire refinery module.


Hint: the ISRU is able to fill external tanks. But only those parts of it's original module. It cant fill it through the docking ports.

Here is the other weird thing about this. Monopropellant, ore or even Metal is unnafacted by this problem. It only applies to chemical fuel for bipropellant propulsion. Exclusively stuff like oxidizer, hydrogen, liquid fuel.

I even tried to land a ship on the launch pad I made. It wont fill the vessel there either.

I recreated a smaller version of this base on my sandbox save on kerbin and it behaved like I wanted to. I wonder what the problem could be? None of the parts used has "no cross feed" and I am able to transfer the fuel from the refinery module to the other modules manually... But this is rather tedious and requires me to have a large fuel tank attached to the refinery module. Which goes against what I want for it. The only solution seems to redesign some aspects of my base and just simply not have fuel tanks anywhere else.

Is there a bug I could look for in the save file to fix this? I am just curious what specifically prevents this from being possible on my larger base. While a smaller base with the same refinery module and base modules on kerbin in creative works just fine... And as said. The isru is able to fill other tanks. It just bugs out on my larger base and is unable to fill tanks on docked vessels there. As if it dont recognice those tanks as part of itself.

[jimmymcgoochie]

Have you enabled cross feed on the docking ports?

[Zefnoly]

  On 9/21/2023 at 9:52 AM, jimmymcgoochie said:

Have you enabled cross feed on the docking ports?

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Yes! Other fuel types like Monopropellant works fine! And they dont even have a toggle for it as it should be permanently enabled on the ones I use. I will mention I dock the stationparts with the expandotubes from Nertea's Stockalike stationparts mod as they make surface building more convenient to me and nicerlooking. This problem has never happened before and afaik their behavoir is the same as grappling hooks kindof but they should allow fuel crossfeed. When I try to recreate this in sandbox I cant seem to do it and it works as intended. If this is a known bug only for those expandotubes I will refrain from using them and rebuild my moonbase. But I did read somewhere this is a potential bug tied to refinery modules alone and happens on larger bases. Which would be sad as I installed simpleconstruction just to make larger bases easier and more convenient to make in my career game.

Again as specified. It simply cant transfer fuel to parts of the base considered seperate docked vessels. It has no issue however sending fuel directly to tanks it was built with on its own vessel structure.

My other solution is to simply rebuild the refinery module. I just unlocked the largest cryogenic tank and it makes this problem workable in that manner as I can stil transfer fuel manually. So I just need to make sure it has as large buffer on itself as possible.