Hi, First, thank you very much for your help. As for the special characters in French (é, è, à, ç, ë, ê ...) do not seem to be the cause of the problem. Or did not I notice?
On the other hand, it is the change in the case of characters that is decisive: Indeed, I did a test on a book saved in epub and ORIGINAL_epub formats. Then, I copied this same title in the same library in epub format as well. So, in duplicate. When opening in the editor for reading, no problem. Then, I change the name of the author (First Name Last Name > First Name Last NAME) on a copy and I save. Well, the cover has disappeared, ditto for the book (both copies!?) Only the opf file remains. If I try to open it, I get the following error: calibre, version 3.30.0 ERROR: Unable to open eBook: Failed to read the book, / media / m**** / S***_livres / Library calibre / Claude-Catherine Kiejman / Eleanor Roosevelt _ First lady and rebel (22254) /metadata.opf click "Show details " for more information Traceback (most recent call last): File "site-packages / template / utils / ipc / simple_worker.py", line 289, in main File "site-packages / template / ebooks / oeb / iterator / book.py", line 65, in extract_book File "site-packages / caliber / customize / conversion.py", line 246, in __call__ File "site-packages / template / ebooks / conversion / plugins / html_input.py", line 90, in convert File "site-packages / template / ebooks / conversion / plumber.py", line 1311, in create_oebbook File "site-packages / template / ebooks / oeb / reader.py", line 72, in __call__ File "site-packages / template / ebooks / oeb / reader.py", line 704, in _all_from_opf File "site-packages / caliber / ebooks / oeb / reader.py", line 349, in _spine_from_opf OEBError: Spine is empty A priori, the problem originates from the management of lowercase and uppercase by Calibre (Title > TITLE, First name Lastname > Firstname LastNAME). Have a great day. -- You received this bug notification because you are a member of Edubuntu Bugsquad, which is subscribed to calibre in Ubuntu. https://bugs.launchpad.net/bugs/1758548 Title: impossible to visualize: Book does not have a format available To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1758548/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~edubuntu-bugs Post to : [email protected] Unsubscribe : https://launchpad.net/~edubuntu-bugs More help : https://help.launchpad.net/ListHelp
