Errors like the one you posted are quite common so I wouldn't be that concerned about them unless that's all you see. If you're running anything else on the Tivo while you're extracting TyTool will sometimes simply quit or even cause the Tivo to reboot. If you're using a DTivo, try placing it in standby mode prior to extracting. This stops the video from being buffered to the hard drive and frees up resources for the CPU.
Please don't PM me or any other members looking for personal assistance. You'll do better by posting (after you've exhausted the search feature, of course) and taking advantage of the collective expertise of the membership instead of a single individual that may or may not be able to help you. Thank you and enjoy your stay at DDB!