Error when updating cache metadata on the connected device

[sylvain62]

Hi everyone,

I was trying to update metadata on ma device when I got an error.
Exactly I connected my Asus MemoPad 7 with SD to my laptop.
Calibre recognize it directly. It checked and detected the the books on m SD card on my device.
I have both the same books in my Calibre on my computer and SD card.
I changed some metadata on my Calibre biblio, and I integrated the metadata using the tools.

Then I wanted to update those metadata on my SD on my Device. I used the button "update cahe metadata on connected device" (something like that, I have a french version, not sure about the name in the english version).

I got this message:

calibre, version 2.21.0
ERREUR : Erreur: Erreur pendant la communication avec le dispositif

Cannot write to file: hr=2147500037 facility=0 error_code=16389 description: Erreur non spécifiée


Traceback (most recent call last):
  File "site-packages\calibre\gui2\device.py", line 87, in run
  File "site-packages\calibre\gui2\device.py", line 533, in _sync_booklists
  File "site-packages\calibre\devices\mtp\driver.py", line 311, in sync_booklists
  File "site-packages\calibre\devices\mtp\driver.py", line 301, in write_metadata_cache
  File "site-packages\calibre\devices\mtp\windows\driver.py", line 35, in check_thread
  File "site-packages\calibre\devices\mtp\windows\driver.py", line 439, in put_file
WPDError: Cannot write to file: hr=2147500037 facility=0 error_code=16389 description: Erreur non spécifiée

Is that because the ebooks I tried to update are .pdf file format?
Should I use "sent to device" to update efficiently ?

I have not tried yet with an other format.

Thank Sylvain

[eschwartz]

Update cached metadata only updates the metadata.calibre cache file, not the metadata in the books. The clue is the word "cache".

Send-to-device will transfer a new copy of the book, PDF or otherwise -- containing the properly-embedded metadata.


The problem is, it seems your device is having memory issues.

[chaley]

Originally Posted by eschwartz

Update cached metadata only updates the metadata.calibre cache file, not the metadata in the books. The clue is the word "cache".

For intelligent devices such as sonys, kobos, CC, and ??, "update cached metadata" will update the device database, in many cases obviating the need to resend the books. For other devices it just improves book matching when connecting.

[eschwartz]

Isn't that automatically handled on connection, depending on your settings?

[chaley]

Originally Posted by eschwartz

Isn't that automatically handled on connection, depending on your settings?

You are correct. Assuming automatic metadata management, the "update cached metadata" operation does one of the job steps performed during a connection (send metadata to device). It was added when the "Match books to library" command was added because if the metadata was not re-written then matching on the next connect would fail. It turned out to be quite useful after doing a lot of metadata editing while connected, again saving some time over a full connect cycle.

EDIT: fix the reason why sending metadata was added along with match books to library.

[eschwartz]

... which makes sense, now that I think of it...

Anyway -- good point and I will keep that in mind for the future. (Although of course, it doesn't seem to be the answer in this particular case.)