Do you have it saved as an ma or mb with an ma you might be able to open the file and remove the reduce node. The only other thing that springs to mind is trying to open it on another machine. if you want i'll try it for you see if I can get it to work. you can send it to me at firstname.lastname@example.org if you like.
Best of luck
From a readers' Q and A column in TV GUIDE: "If we get involved in a nuclear war, would the electromagnetic pulses from exploding bombs damage my videotapes?"