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Old 09-03-2019, 10:01 PM   #1
stoney77
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Error when sending books to Kobo Forma
I get the following error message when I try to send books(epub) from my Calibre library to my Kobo Forma:

calibre, version 3.47.0
ERROR: Error: Error communicating with device

'NoneType' object has no attribute 'startswith'

Traceback (most recent call last):
File "site-packages/calibre/gui2/device.py", line 90, in run
File "site-packages/calibre/gui2/device.py", line 594, in _upload_books
File "calibre_plugins.kobotouch_extended.device.driver" , line 399, in upload_books
File "site-packages/calibre/devices/kobo/driver.py", line 2087, in upload_books
File "calibre_plugins.kobotouch_extended.device.driver" , line 313, in _modify_epub
File "lib/python2.7/posixpath.py", line 254, in expanduser
AttributeError: 'NoneType' object has no attribute 'startswith'

I've tried researching this problem but the discussions get very technical and I am totally unable to follow.

Can someone please give me some clue as to how to proceed? I'm using Calibre 3.47 on a Mac High Sierra 10.13.6. This is a new problem to me--I've been sending books to my various Kobo devices for years with no problems. Thanks in advance.
Last edited by stoney77; 09-03-2019 at 10:02 PM. Reason: misspelling
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Old 09-03-2019, 11:04 PM   #2
DNSB
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There was an issue with 3.47 but I'm not sure if it would cause the error message you were seeing. You can download 3.47.1 and see if it helps.
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Old 09-03-2019, 11:23 PM   #3
davidfor
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Quote:
Originally Posted by stoney77 View Post
I get the following error message when I try to send books(epub) from my Calibre library to my Kobo Forma:

calibre, version 3.47.0
ERROR: Error: Error communicating with device

'NoneType' object has no attribute 'startswith'

Traceback (most recent call last):
File "site-packages/calibre/gui2/device.py", line 90, in run
File "site-packages/calibre/gui2/device.py", line 594, in _upload_books
File "calibre_plugins.kobotouch_extended.device.driver" , line 399, in upload_books
File "site-packages/calibre/devices/kobo/driver.py", line 2087, in upload_books
File "calibre_plugins.kobotouch_extended.device.driver" , line 313, in _modify_epub
File "lib/python2.7/posixpath.py", line 254, in expanduser
AttributeError: 'NoneType' object has no attribute 'startswith'

I've tried researching this problem but the discussions get very technical and I am totally unable to follow.

Can someone please give me some clue as to how to proceed? I'm using Calibre 3.47 on a Mac High Sierra 10.13.6. This is a new problem to me--I've been sending books to my various Kobo devices for years with no problems. Thanks in advance.
That's an error in the KoboTouchExtended driver. I really thought I had solved that with the last release of the driver. The workaround is in the thread for the driver.
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Old 09-04-2019, 12:49 PM   #4
stoney77
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I downloaded and installed 3.47.1 but I'm still getting the same error message. Should I just wait for the next release. I read "thread for the driver" but I don't know where to find the files to delete. Thanks for your help.
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Old 09-05-2019, 12:17 AM   #5
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It isn't an issue with the calibre version, it is a problem in the configuration for the driver. A search in the thread for those file names would have told you where they are. But, they are in the calibre configuration directory. The easiest way to get to that is top open the calibre preferences, go to the "Miscellaneous" page and press the button to open the configuration directory.
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