I've been messing with a custom gmod map recently trying to make a movie. The map worked perfectly fine and I had everything saved. Today I tried playing it again and when I interact with the objects I placed, they fall through the map. Same goes for spawning. They just fall into the ground, never to be seen again.
After trying again, I get his error: IVP Failed at ..\ivputility\ivuvhash.cxx 159. The scripted entities using VPhysics stop colliding with the world, and fall through the floor. GMod crashes shortly afterwards citing the engine error.
Gmod with then crash if a prop falls through. Does anyone know how to fix this? Why would this happen and how can I save my saved game?