In addition, Calibre supports a wide range of e-book readers, including Amazon Kindle, Barnes & Noble Nook, and Kobo e-readers, and can automatically sync e-books with these devices. This is particularly useful for those who want to read e-books on different devices that may not support the same file format. It also allows users to edit the metadata of their e-books, including the title, author, and cover image, and can even download missing metadata from online sources.Ĭalibre also provides a powerful e-book conversion tool, allowing users to convert e-books from one format to another, such as from EPUB to MOBI, or from PDF to EPUB. One of the most notable features of Calibre is its ability to organize e-books into different categories and add tags, making it easy to search and locate specific books. It was first released in 2006 and has since become one of the most popular e-book management tools available. That is probably overkill.Calibreis a free and open-source e-book management software that allows users to manage their e-books, convert between different e-book formats, and sync e-books with various devices. If none of the above works, you can do a factory reset. Unfortunately, you will lose the reading status and annotations for these, but, that's pretty much already happened. It will then reimport your sideloaded books. This will clear the database and create a new one when sign in. Sign out of the Kobo account on the device and back in. This can be done from any SQLite database management tool, or using my Kobo Utilities plugin. From the error, you have, this is unlikely to work, but, it won't harm anything. Run a VACUUM or compress on the database. The simplest is if you don't safely eject the device and something is still trying to update it when you unplug it. The database can be corrupted in different ways. For example, it is unlikely that EPUBOR will show any books purchased from Kobo and downloaded to the device. But, they do not necessarily show the correct state. Other tools that do not read the devices database and work by scanning the drive, will still work. After that, you might find books missing, or the reading status reverted to a previous status. This means that the most likely time you will see a problem is after restarting the device. The device largely works from in-memory data structures and writes to the database as needed. Depending on exactly what parts of the database are bad, and how you use the device, you might not notice any problems. Because of that, calibre cannot read the database to work out what books are on it. That error is a sign that the database on the device is corrupted. Thanks for the effort and your assistance in advance. So it seems to me that there is an issue with Calibre then. Note that I do not have this problem with my Kindle ereader.Īlso through EPUBOR ULTIMATE ebook management software I have access to the Kobo Aura H2O contents when I connect this ereader to the computer. Uninstalling and reinstalling of the Calibre software does not help. ![]() It only occurred recently, but since then everytime I connect the Kobo ereader this message appears. This is strange because I haven't had this problem before. c", line 236, in resetcursorĬorruptError: CorruptError: database disk image is malformedįollowing this error in terms of device library no contents are being shown and management of contents is not possible - a blank screen appears for the library, which is not in agreement with what is really stored on the Kobo device. py", line 513, in _booksįile "site-packages\ calibre\ devices\ kobo\driver. py", line 90, in runįile "site-packages\ calibre\ gui2\device. _ _ _ _ _ _ _ĮRROR: Error: Error communicating with deviceĬorruptError: database disk image is malformedįile "site-packages\ calibre\ gui2\device. "Error communicating with device" - see details below So the issue here is not detection - the issue seems communication. It appears to be detected in some way though. To be sure: I followed your guidelines written in the manual section "My device is not being detected by Calibre". This is the error message that pops up when I try to connect the Kobo Aura H2O ereader.
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