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Didn't make any difference. Worked one time after deleting the files then back to error most of the time.
If I send 1 or 2 books, it'll work sometimes, but if I send a bunch while testing it appears to get 10 or 12 onto the tablet, then throw the error. Calibre doesn't show the books that downloaded until shut down and restarted.
calibre, version 4.3.0
ERROR: Error: Error communicating with device
Cannot write to file: hr=2147942431 facility=7 error_code=31 description: A device attached to the system is not functioning.
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 "site-packages\calibre\devices\mtp\driver.py", line 439, in upload_books
File "site-packages\calibre\devices\mtp\windows\driver.py", line 36, in check_thread
File "site-packages\calibre\devices\mtp\windows\driver.py", line 440, in put_file
WPDError: Cannot write to file: hr=2147942431 facility=7 error_code=31 description: A device attached to the system is not functioning.
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