I built a small lunar station with a few modules, some lights, a tank, and the solar panels. I saved this as a scenario. When I reloaded, I noticed the boxes the modules came in were still there (and very untidy) so I did an EVA and put them to one side and resaved the scenario using a different name. Now the only thing visible are the lights and boxes (and the DG-IV). Looking at the .scn files, they appear to be similar, so I was wondering where the difficulty may lie.