I have two fuel containers loaded in my DGIV Cargo bay but when I push the button "Use Fuel Cargo" I get a message "No Fuel Cargo Found" How do I refuel using the fuel in cargo bay?
Thanks
Thanks
I'm not at home, but if memory serves, there are two different commands that "use" fuel cargo. Which one you use depends on whether the cargo is loaded, or unloaded but nearby.
UCGO cargo's which are loaded on a vessel don't exist as far as the Orbiter core are concerned, while unloaded "free" cargo's are vessels.
If you are using the command to "load a nearby cargo" it will fail if there are no free cargo's near you, and the DGIV is looking outside the vessel for a UCGO vessel designated as a fuel container. The ones you have loaded won't show up here.
The containers do disappear when they are empty.I don't remember if its possible for a fuel container to be empty - they may delete themselves after use.
You can use both space fuel and barrel fuel. Each of them add 1048 kg of fuel into your main tanks and then dissappear from the payload bay.However, there are two types of fuel cargo unit: barrel fuel and space fuel. If I remember well, only space fuel can be used to load DGIV's tanks in orbit.
Im pushing "Use Fuel Cargo" but its says "none found". I even opened the cargo bay doors and there are two fuel containers inside. Ive read the manuel but cant find anything explaining this.

"Containers"? Is there any chance you are using the (now obsolete) old style DGIV cargo? (see pic).
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If you are using this type of cargo (which is just one container), then you have to release the payload, dock with it and transfer the fuel via the "FUEL & ENGINES SYSTEM" (Lower panel, left side).
Hope this helps,
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The problem with that is that you can get unlimited fuel that way. If you'll notice, you can also get O2 from the fuel canister, and fuel from the LIFE SUPPORT canister as well. It's just the DGIV's response to being docked to any vessel (you could stick a docking port on an UMmu's head and refuel on his brainmatter if you wanted.)If you are using this type of cargo (which is just one container), then you have to release the payload, dock with it and transfer the fuel via the "FUEL & ENGINES SYSTEM" (Lower panel, left side).
The problem with that is that you can get unlimited fuel that way. If you'll notice, you can also get O2 from the fuel canister, and fuel from the LIFE SUPPORT canister as well. It's just the DGIV's response to being docked to any vessel (you could stick a docking port on an UMmu's head and refuel on his brainmatter if you wanted.)
So, you can refuel, but it's sort of cheating...