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Old 03-30-2012, 01:34 PM   #1
Writer.Kara
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Kindle - Error communicating with device

I'm running Calibre (0.8.45) on Windows 7 Home.

When I plug the Kindle in, I get the following error in Calibre:

calibre, version 0.8.45
ERROR: Error: Error communicating with device

[Errno 22] invalid mode ('wb') or filename: u'F:\\metadata.calibre'

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 82, in run
File "site-packages\calibre\gui2\device.py", line 339, in _books
File "site-packages\calibre\devices\kindle\driver.py", line 329, in books
File "site-packages\calibre\devices\usbms\driver.py", line 243, in books
File "site-packages\calibre\devices\usbms\driver.py", line 387, in sync_booklists
File "site-packages\calibre\devices\usbms\driver.py", line 385, in write_prefix
IOError: [Errno 22] invalid mode ('wb') or filename: u'F:\\metadata.calibre'

What can I do?

Thanks so much!
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Old 03-30-2012, 02:48 PM   #2
kovidgoyal
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That error indicates you most probably have too many files in the root of your kindle drive. Delete some.
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Old 03-30-2012, 05:09 PM   #3
Writer.Kara
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Thanks for the response!

I went into Windows Explorer and found only a few folders and two files, one of which was related to Calibre. I deleted absolutely everything I didn't need.

When I restarted Calibre, I got the same error:

calibre, version 0.8.45
ERROR: Error: Error communicating with device

[Errno 22] invalid mode ('wb') or filename: u'F:\\metadata.calibre'

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 82, in run
File "site-packages\calibre\gui2\device.py", line 339, in _books
File "site-packages\calibre\devices\kindle\driver.py", line 329, in books
File "site-packages\calibre\devices\usbms\driver.py", line 243, in books
File "site-packages\calibre\devices\usbms\driver.py", line 387, in sync_booklists
File "site-packages\calibre\devices\usbms\driver.py", line 385, in write_prefix
IOError: [Errno 22] invalid mode ('wb') or filename: u'F:\\metadata.calibre'
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Old 03-30-2012, 08:44 PM   #4
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Kara, there are some getting a similar error with the Kobo Touch, see this thread if you're interested...[unfortunately haven't fixed it yet]

http://www.mobileread.com/forums/sho...=171786&page=3

Last edited by Blue2u; 03-30-2012 at 08:50 PM. Reason: clarification
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Old 03-30-2012, 10:13 PM   #5
Writer.Kara
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Ooh, thank you! I've always been suspicious of how Windows 7 handles USB. I got some strange errors when I first configured my PC, all of them centered around USB issues.

I'll give this a try on some other computers and see if it's a workaround.
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Old 03-30-2012, 11:13 PM   #6
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Then make sure your kindle is not being mounted readonly.
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