Creatures Caves

I keep getting an error while doing wolfing runs. Here it is:

CSE0001: Caught C-style structured exception at 0x004733F3

EXCEPTION_ACCESS_VIOLATION
The thread attempted to read from or write to a virtual address for which it does not have the appropriate access.
Attempt was to read from address 0x00000000

Contained in: "public: void __thiscall DisplayEngine::Update(class Background *,class DrawableObjectHandler *,bool,bool,struct IDirectDrawSurface4 *)" in DisplayEngine.obj
Contained in: "public: void __thiscall CameraSprite::Update(class Position,bool,bool)" in CameraSprite.obj
Contained in: "public: void __thiscall Camera::Update(bool,bool)" in Camera.obj
Contained in: "public: void __thiscall MainCamera::ResizeWindow(void)" in MainCamera.obj

As far as I can tell it doesn't seem to be related to any particular agent I'm injecting, since it's occurred in different worlds with different agents injected. Can someone who knows CAOS better explain what's going on and how to stop it from happening? It also seems like once I've gotten this error I have to export all norns and move them to a new world or else the error will keep occurring at roughly the same time.