I have noticed this problem to and have uncovered the issue. The Regolith DLL ART needs to function is outdated. For anyone wishing to use ART with MKS: I found a work around that is not perfect. With this work around you cannot have both functioning at the same time but you can have all the parts and ships set up in the same save file: If you want to mine an Asteroid, simple replace the installed Regolith DLL with the one supplied by ART. If you want to use MKS or any other mods that are shipped with Regolith, replace the Regolith DLL with the one supplied by the mods. So far i only need the most recent version Regolith DLL (1.7) and the one that ships with ART. It seems to be only the mining that needs the old Regolith DLL, anything resource related (such as converters any stored rocks) seem to work just fine. I think even fuel hatch work to some extent without needing the old DLL. That said, while the old DLL is installed, MKS parts will not be working so watch your food, water, air and power. Also try using a different version of ModuleManager if things are still broken. So far I know everything works with 2.5.9 but not the most recent 2.5.13. Have not tested with any versions in between. I currently have an MKS station with an asteroid attached to it to get substrate in a save file running all of the USI Catalog (http://bobpalmer.github.io/UmbraSpaceIndustries/) and it works for the most part. My fix does require restarting KSP each time you want to change so its probably best to mine as much asteroid as you want/need in one go and simply make sure your stations/bases have a large backup supply of food, water, ect. Thanks for the awesome mods RoverDude! If your asteroids do not seem to store or create rocks even with the mod installed correctly, make sure the asteroid.cfg file in the Regolith folder looks like this: @PART[PotatoRoid] { MODULE { name = REGO_ModuleAsteroidInfo } RESOURCE { name = Rock amount = 0.0001 maxAmount = 0 } } It seems that if the rock resource is not in the Regolith asteroid.cfg then it does not work.