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Same experience as YumiYumi in #1 after upgrading to Calibre 6.27! Up to very recently, I had no problem downloading covers for multiple books in Win10 with a very high hit rate, often even 10/10. Now, with 6.27, the Big Book Cover Search does no longer seem to work properly producing the following errors in the log:
****************************** Open Library Covers ******************************
Request extra headers: [('User-agent', 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36')]
Failed to download valid cover
Took 0.8076159954071045 seconds
No cover for ISBN: '9783476050885' found
************************************************** ******************************
****************************** Big Book Search Covers ******************************
Request extra headers: [('User-agent', 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36')]
Failed to download valid cover
Took 0.6220755577087402 seconds
Failed to download cover from Big Book Search
Traceback (most recent call last):
File "calibre\ebooks\metadata\sources\covers.py", line 42, in run
File "calibre\ebooks\metadata\sources\big_book_search.p y", line 43, in download_cover
File "calibre\ebooks\metadata\sources\big_book_search.p y", line 18, in get_urls
File "mechanize\_mechanize.py", line 257, in open
File "mechanize\_mechanize.py", line 313, in _mech_open
mechanize._response.get_seek_wrapper_class.<locals >.httperror_seek_wrapper: HTTP Error 404: Not Found
************************************************** ******************************
The log above indicates that there is no cover in the Open Library. However, there is a correct cover in the Big Book Search database which I also checked online. Unfortunately, something goes wrong when Calibre tries to download it. This did not happen in previous Calibre versions. I checked this by manually (Metadata Editor) searching again for covers for books that are already in my Calibre database and for which Calibre had been able to find them successfully. Now, with 6.27, I am drawing a blank with the error reported above.
Any ideas how to rectify the problem?
Many thanks for any suggestions.
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