@Gremillion scoured the logs and the cache and don't see why it's happening but things aren't being patched that need to be. (sound familiar?) @PART[*]:HAS[@MODULE[ModuleFuelTanks],@MODULE[SSTUModularPart]]:FINAL { @MODULE[SSTUModularPart] { %subtractMass = false %subtractCost = false } } The above patch should render the mass = 0 patch unnecessary. You should be able to safely remove or disable it. If the above patch does NOT fix the issue then you don't have the right versio
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