I've been messing around with this mod to try and produce rocket fuel from Mars' atmosphere, as inspired by The Martian. Because I couldn't find a suitable methane-fuelled rocket, I'm producing kerosene and oxygen using the Fischer-Tropsch reaction, solid oxide electrolysis and water gas shift (to recycle the water produced by the Fischer-Tropsch). Inputs are CO2 from the atmosphere and hydrogen, which is imported from Earth. However, I've come across a problem; I can't seem to liquefy the oxygen I produce. This seems to be the same problem described by adam_ at the very beginning of the 16th page of this thread. I've verified that I have tank space to hold lqdoxygen, that there are no parts preventing flow between the liquefaction array and the tank, and that resources can flow to that tank from other ISRU parts. If you need any more info about the bug, please let me know and I can provide it. Also, I was hoping to use lqdhydrogen rather than hydrogen gas, but it doesn't look like there is currently a part for turning liquid hydrogen into gas. Is that something that is planned for the mod in the future?