I had this same "error" message back in December. I also did a reboot after it happened which then resulted in Reader Library freezing too. I did the same steps to fix it: reinstall Reader Library and reformat ereader. It worked for me. I have since learned that perhaps I didn't need to take such drastic measures. Next time I would take the recommendations in this thread first to delete the kinoma files before doing a complete reinstall and reformat. I have seen it recommended for crash and freezing issues with Reader Library.