I have been working on my game for over a month and a feq days ago i tried to build my lighting for the first time, but i got this error. I tried uninstalling the engine and reinstalling it again but still the same error. I builded the engine from source and tried to build the lightmass trhough visual studio but still the same error. I disabled my firewall, cleared the swarmache and i even migrated everything to a new project but still the same error. The only time when it builds succesfully is on a empty project or when I have a few meshes. I do now know what to do. The only thing i can think of is that it has to do with a specific mesh or texture, because it only happens when certain meshes are in the scene, but i hope someone has a solution