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Old 09-10-2018, 10:00 PM   #61
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I am having the same problem as well! I delete the json file mentioned earlier in the thread and that allowed me to download *some* metadata - it's still missing bits of what I was getting before, particularly the series information. Hope there's a fix, soon!
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Old 09-10-2018, 10:01 PM   #62
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Hi all, I'm Carole - I love Calibre and use it almost daily, but I am having the same problem today that I can't download metadata. Same error message as Ray, that I have not previously encountered. Details as follows:

calibre, version 3.31.0
ERROR: Download failed: Failed to download metadata. Click Show Details to see details

Traceback (most recent call last):
File "site-packages\calibre\utils\ipc\simple_worker.py", line 289, in main
File "site-packages\calibre\ebooks\metadata\sources\worker.py ", line 102, in single_identify
File "site-packages\calibre\ebooks\metadata\sources\update.py ", line 79, in patch_plugins
File "site-packages\calibre\ebooks\metadata\sources\update.py ", line 62, in patch_search_engines
File "<string>", line 11, in <module>
ImportError: No module named polyglot.builtins
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Old 09-10-2018, 10:12 PM   #63
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Here is the set of steps to have calibre auto-update metadata-sources-cache.json
  1. Restart calibre
  2. Start a metadata download, it will probably still fail
  3. Wait a minute or two for the cache to be updated
  4. Restart calibre again
  5. Now it should work

And if for any reason this fails to update metadata-sources-cache.json you can always delete it manually to restore functioning. To delete it manually, do the following:
  1. Click Preferences->Miscellaneous
  2. Click "Open calibre configuration directory"
  3. Delete the file "metadata-sources-cache.json"
  4. Restart calibre
Last edited by kovidgoyal; 09-10-2018 at 11:46 PM.
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Old 09-10-2018, 10:14 PM   #64
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Quote:
Originally Posted by kovidgoyal View Post
Here is the set of steps to have calibre auto-update metadata-sources-cache.json
  1. Restart calibre
  2. Start a metadata download, it will probably still fail
  3. Wait a minute or two for the cache to be updated
  4. Restart calibre again
  5. Now it should work
I followed these steps, but it is still not downloading series information like it did before.
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Old 09-10-2018, 10:26 PM   #65
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Are you running calibre 3.31?
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Old 09-10-2018, 11:35 PM   #66
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Someone previously posted a workaround.
Go to Preferences Advanced Miscellaneous.
Open calibre configuration directory.
Delete the file metadata-sources-cache.json.

You will have to do this each time you restart calibre.
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Old 09-10-2018, 11:38 PM   #67
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Quote:
Originally Posted by jomel123 View Post
Someone previously posted a workaround.
Go to Preferences Advanced Miscellaneous.
Open calibre configuration directory.
Delete the file metadata-sources-cache.json.

You will have to do this each time you restart calibre.
Uh
Kovid is the Author of Calibre. His solutions are the Gold Standard.
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Old 09-10-2018, 11:40 PM   #68
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Quote:
Originally Posted by jomel123 View Post
Someone previously posted a workaround.
Go to Preferences Advanced Miscellaneous.
Open calibre configuration directory.
Delete the file metadata-sources-cache.json.

You will have to do this each time you restart calibre.
Moderator Notice

Kovid has fixed it - see post #61

Ninja'd

BR
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Old 09-10-2018, 11:45 PM   #69
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Quote:
Originally Posted by kovidgoyal View Post
Are you running calibre 3.31?
Running calibre 3.31 here. I tried the 5 steps and after 5 minutes the metadata-sources-cache.json file still had a modified timestamp from when I was testing it around 14:15 PDT and the error was popping up. I retried a couple of times and still not working. I tried deleting the file and metadata downloading worked. A new metadata-sources-cache.json was created with a 20:35 PDT modified timestamp. I've closed and opened calibre ~6 times and the metadata download is still working.

Perhaps a step 1A should be added: Open Preferences, select Change calibre behavior, under Advanced select Miscellaneous, select Open calibre configuration directory. Delete or rename metadata-sources-cache.json.
Last edited by DNSB; 09-10-2018 at 11:49 PM. Reason: Fat fingers cause typos...
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Old 09-10-2018, 11:48 PM   #70
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Odd, but in any case, I have amended the instructions with what to do if the auto-update does not work. It might just take a few hours for the updated file to make its way through the various proxies/caches/etc.
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Old 09-10-2018, 11:52 PM   #71
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Old 09-11-2018, 05:44 AM   #72
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Originally Posted by PacificNW View Post
Hey! That was the solution I posted several hours ago in the other thread.
Yes indeed you did and it worked for me. Thank you PacificNW
Last edited by Mireille005; 09-11-2018 at 05:46 AM.
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Old 09-11-2018, 05:49 AM   #73
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Originally Posted by kovidgoyal View Post
Here is the set of steps to have calibre auto-update metadata-sources-cache.json
Thank you so much for the quick response.
And of course and more importantly: Thank you for Calibre!
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Old 09-11-2018, 06:59 AM   #74
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Quote:
Originally Posted by kovidgoyal View Post
Are you running calibre 3.31?
Yes. I also just tried again after having given it all night, and it is still not pulling series information. :-/
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Old 09-11-2018, 07:30 AM   #75
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Calibre is working now. I don't know why.
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