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Old 10-05-2020, 10:03 PM   #1
droopy
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Calibre 5.1.0. Error communicating with device
Oct 8 update: Problem is resolved.

I was able to add books to my Kobo Forma just yesterday. But today, when I connect my Kobo Forma, Calibre successfully syncs page locations for the books but then abruptly disconnects the device. This means I can't add books to the device.

Here's the error message:
Quote:
Error communicating with device

calibre, version 5.1.0
ERROR: Error: Error communicating with device

CantOpenError: unable to open database file

Traceback (most recent call last):
File "site-packages/calibre/gui2/device.py", line 89, in run
File "site-packages/calibre/gui2/device.py", line 542, in _sync_booklists
File "calibre_plugins.kobotouch_extended.device.driver" , line 438, in sync_booklists
File "site-packages/calibre/devices/kobo/driver.py", line 175, in device_database_connection
apsw.CantOpenError: CantOpenError: unable to open database file
Last edited by droopy; 10-08-2020 at 12:43 PM.
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Old 10-05-2020, 10:09 PM   #2
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Some Calibre plugins broke on the update to 5.1.0. If you don't want to downgrade back to 5.0.1 (which is what I did for now), I think there's a working test version of the Kobo Touch Extended Drivers in the plugins forum.

I'd also check Reading List for a test version because I think sync_booklists might be that.
Last edited by ownedbycats; 10-05-2020 at 10:11 PM.
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Old 10-05-2020, 10:33 PM   #3
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Hi cats,
I looked at "What's New" with version 5.1.
Quote:
New features

Enhancement: allow using templates in search expressions
Viewer lookup panel: Add a checkbox to disable automatic update of lookup when the selected text changes.

Closes tickets: 1897435
Viewer: Allow skipping the confirmation when using the remove highlight button in the popup bar.

Closes tickets: 1897415

Bug fixes

ToC Editor: Fix bulk rename of entries not working

Closes tickets: 1897618
Linux: Fix right clicking on system tray icon not working

Closes tickets: 1897571
Fix User category based searches unreliable dues to caching issues

Closes tickets: 1897356
PDF Output: Dont fail if the input document has an html file identified as the cover
Catalog generation: Fix a regression that broke generating catalogs if books with no comments are present.

Closes tickets: 1897467
Windows: Fix error on first run of calibre after install/upgrade

Closes tickets: 1897314
Viewer: Fix copy to clipboard button in toolbar not working
Viewer: Fix copy to clipboard not copying text as HTML to clipboard in addition to plain text

Closes tickets: 1897297
.

I don't think I need/use the new features. And it appears the bugs are not something that affect me. So I'm gonna downgrade to 5.0.1. What's the recommended way to do this on Linux Mint?

Update: I suppose I can wait for the bugs in 5.1 to be fixed. I mean, I have enough books on my device to read. I don't need to sync any books for now. I can wait for Calibre version 5.2 or for the plugins to be fixed.
Last edited by droopy; 10-06-2020 at 08:37 AM.
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Old 10-05-2020, 10:54 PM   #4
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I'm afraid I'm not sure how to downgrade on Linux. On Windows I just uninstalled Calibre (which left behind the settings folder) and then reinstalled 5.0.1 again.
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Old 10-06-2020, 12:11 AM   #5
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The problem with plugins in calibre 5.1.0 is only happening in Windows. It is related to how the plugins are imported. And it has been fixed in a calibre beta.

That error is more likely to be because the device has been disconnected. Or otherwise is not available for calibre to connect to. And it definitely has nothing to do with the Reading List plugin.

When this happened, were you able to access the device afterwards? Could you see it in the OS?
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Old 10-06-2020, 08:39 AM   #6
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Quote:
Originally Posted by davidfor View Post
When this happened, were you able to access the device afterwards? Could you see it in the OS?
No, when my device is abruptly disconnected, I can't see it at all on my OS.
Last edited by droopy; 10-06-2020 at 08:48 AM.
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Old 10-08-2020, 12:23 AM   #7
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I tried connecting my Kobo Forma to my Calibre laptop. Happily, my device no longer abruptly disconnects.
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Old 10-08-2020, 04:58 PM   #8
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Quote:
Originally Posted by droopy View Post
Hi cats,
I looked at "What's New" with version 5.1..

I don't think I need/use the new features. And it appears the bugs are not something that affect me. So I'm gonna downgrade to 5.0.1. What's the recommended way to do this on Linux Mint?

Update: I suppose I can wait for the bugs in 5.1 to be fixed. I mean, I have enough books on my device to read. I don't need to sync any books for now. I can wait for Calibre version 5.2 or for the plugins to be fixed.
sudo -v && sudo calibre-uninstall && wget -nv -O- https://download.calibre-ebook.com/linux-installer.sh | sudo sh/dev/stdin version=5.0.1
must not have space between /
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