This error is typically caused when an eReader has not been authorized properly. To solve the issue, you'll need to reset the Adobe credentials (which come from Adobe Digital Editions) on your device.

Note: These instructions are for ADE 2.0 or newer. We recommend always using the latest version of ADE.

What you need

Check your Adobe authentication using Windows

  1. Make sure your computer is properly authorized.
    In ADE, go to Help > Authorization Information.
    Note: If this option is grayed out, please authorize your computer before continuing.
    Screenshot showing Authorization Information highlighted in the ADE Help menu
    The authorization window will open and show you what credentials you're currently using on your computer.
    Screenshot showing the Adobe ID authorization window
  2. Close ADE.
  3. Reset the ADE folder on your device.
    • Connect your eReader to your computer (if it's not already connected).
    • Double-click your device under "[My] Computer."
    • Locate the folder .adobe-digital-editions and delete it.
  4. Open ADE, then try transferring the eBook again.

Check your Adobe authentication using a Mac

  1. Make sure your computer is properly authorized.
    In ADE, go to Help > Authorization Information.
    Note: If this option is grayed out, please authorize your computer before continuing.
    Screenshot showing Authorization Information selected from the ADE Help menu
    The authorization window opens and shows you what credentials you're currently using on your computer.
    Screenshot showing the ADE authorization window
  2. Close ADE.
  3. Reset the ADE folder on your device.
    • Connect your eReader to your computer (if it's not already connected).
    • Open your device from Finder.
    • Locate the folder .adobe-digital-editions and delete it.
      Note: If you don't see this folder, it may be hidden, in which case you'll need to follow these steps to view hidden files on a Mac and then delete the folder.
  4. Open ADE, then try transferring the eBook again.
Last Updated: Jan 10, 2017 12:38PM EST