[MSWallack]

I'm trying to send my books to my new iPad mini. Calibre works for a minute or two and then displays this message:

calibre, version 1.18.0
ERROR: Error: Error communicating with device

(-2147352567, 'Exception occurred.', (0, None, u'The track is not modifiable.', None, 0, -1610350077), None)

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 85, in run
File "site-packages\calibre\gui2\device.py", line 572, in _upload_books
File "site-packages\calibre\devices\apple\driver.py", line 1232, in upload_books
File "site-packages\calibre\devices\apple\driver.py", line 3138, in _update_iTunes_metadata
File "site-packages\win32com\client\dynamic.py", line 534, in __setattr__
com_error: (-2147352567, 'Exception occurred.', (0, None, u'The track is not modifiable.', None, 0, -1610350077), None)