Error Message, shared for the heck of it: show ArgumentError: Error #2004: One of the parameters is invalid.
at flash.display::Graphics/drawRect()
at com.runouw.ll.engine.backgrounds::CloseBGGeneral/draw()
at com.runouw.ll.engine.backgrounds::CloseBGGeneral/enterFrame()
at com.runouw.ll.engine.modes::LevelDesignerEngine$/enterFrame()
at com.runouw.ll.engine::GameEngine$/enterFrame()
at MethodInfo-399()
at MethodInfo-417()
at com.runouw.ll.engine::GameEngine$/setTilesColorData()
at MethodInfo-397()
at com.runouw.ll.engine.core::Course/attachingItemsFrame()
I think this error was my fault. I kept the game window minimized while my laptop already had something else not responding, which made my level take ridiculously longer to load (and fail to). However, this error message popped up while the game was still minimized, so I don't really know what happened when it appeared.