[cheesygiraffe]

calibre, version 0.8.65
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 83, in run
File "site-packages\calibre\gui2\device.py", line 405, in _books
File "site-packages\calibre\devices\kindle\driver.py", line 334, in books
File "site-packages\calibre\devices\usbms\driver.py", line 246, in books
File "site-packages\calibre\devices\usbms\driver.py", line 391, in sync_booklists
File "site-packages\calibre\devices\usbms\driver.py", line 389, in write_prefix
IOError: [Errno 22] invalid mode ('wb') or filename: u'F:\\metadata.calibre'