Error communicating with device (Kobo)

rainshine · 02-07-2016, 07:44 PM

Hi,

I've been getting "Error communication with device" on my Calibre when I try to send books to my Kobo Aura.

I've tried factory resetting the device, and the error is still ongoing. It doesn't happen with every book, but I get it when I'm sending books that previously existed on my Aura with no problems.

Here's what the error message says:

Quote:

calibre, version 2.50.1
ERROR: Error: Error communicating with device

Failed to find obfuscation key

Traceback (most recent call last):
File "site-packages/calibre/gui2/device.py", line 87, in run
File "site-packages/calibre/gui2/device.py", line 584, in _upload_books
File "calibre_plugins.kobotouch_extended.device.driver" , line 294, in upload_books
File "site-packages/calibre/devices/kobo/driver.py", line 1918, in upload_books
File "calibre_plugins.kobotouch_extended.device.driver" , line 184, in _modify_epub
File "site-packages/calibre/ebooks/oeb/polish/container.py", line 1016, in __init__
File "site-packages/calibre/ebooks/oeb/polish/container.py", line 1133, in process_encryption
ObfuscationKeyMissing: Failed to find obfuscation key

I've tried searching these forums but haven't found a resolution.

Thanks in advance!

davidfor · 02-07-2016, 09:06 PM

That is not a fault with the device. The problem is happening while the KoboTouchExtended driver is doing its work. It has to open the book to make the changes to convert it to a kepub. The book appears to have an embedded font that is obfuscated. Unfortunately, the obfuscation key for the font can't be found. Without seeing the book, I can't say anything else about why this would be the case.

I suggest you report this in the extended driver thread. The error with the book won't be fixable there, but, the error can be caught and treated like other encrypted books.

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02-07-2016, 09:06 PM	#2
davidfor Grand Sorcerer Posts: 24,905 Karma: 47303822 Join Date: Jul 2011 Location: Sydney, Australia Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos	That is not a fault with the device. The problem is happening while the KoboTouchExtended driver is doing its work. It has to open the book to make the changes to convert it to a kepub. The book appears to have an embedded font that is obfuscated. Unfortunately, the obfuscation key for the font can't be found. Without seeing the book, I can't say anything else about why this would be the case. I suggest you report this in the extended driver thread. The error with the book won't be fixable there, but, the error can be caught and treated like other encrypted books.

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