This error can happen if the conversion of your database was interrupted while updating to a new version.


  1. Download this version of Book Collector for macOS and install it.
  2. Open your database with this older version (use File > Open database if it doesn’t open automatically).
  3. Click menu Tools > Maintenance > Regenerate Search Strings and wait for it to finish (it can take a little while)
  4. Now install the latest version using menu Book Collector > Check for Updates.
  5. After installing, the database will start converting to the latest version.

If that doesn’t work, please contact us.

Need more help with this?
Don’t hesitate to contact us here.

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