xWoom

use the events WorldEvent.Load to load and WorldEvent.Save to save. this is an example: @SubscribeEvent public void onWorldLoad(WorldEvent.Load event) { ModWorldSavedData.get(event.getWorld()); } @SubscribeEvent public void onWorldSave(WorldEvent.Save event) { ModWorldSavedData.get(event.getWorld()).markDirty(); }

Thank you so much