Cannot communicate with Sony PRS 650

[Colin Richardson]

calibre, version 5.3.0
ERROR: Error: Error communicating with device

'>' not supported between instances of 'NoneType' and 'NoneType'

Traceback (most recent call last):
  File "calibre\gui2\device.py", line 89, in run
  File "calibre\gui2\device.py", line 512, in _books
  File "calibre\devices\prs505\driver.py", line 199, in books
  File "calibre\devices\usbms\driver.py", line 306, in books
  File "calibre\devices\prs505\driver.py", line 227, in sync_booklists
  File "calibre\devices\prs505\sony_cache.py", line 441, in update
  File "calibre\devices\prs505\sony_cache.py", line 502, in update_playlists
  File "calibre\devices\usbms\books.py", line 308, in get_collections
  File "calibre\devices\usbms\books.py", line 27, in none_cmp
  File "polyglot\builtins.py", line 114, in cmp
TypeError: '>' not supported between instances of 'NoneType' and 'NoneType'

[Kovid Goyal (kovid)]

Fixed in branch master. The fix will be in the next release. calibre is usually released every alternate Friday.

 status fixreleased