[MrJamesEMcBride]

Hello,
When I connect my Fire8, Calibre will chug along on it for about an hour or so and then just crash out and close.

There have been times where it has given me a Communication Error and when I did the dump of the error, this is what I got:

calibre, version 4.22.0
ERROR: Error: Error communicating with device



Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 90, in run
File "site-packages\calibre\gui2\device.py", line 514, in _books
File "site-packages\calibre\devices\mtp\driver.py", line 284, in books
File "site-packages\calibre\devices\mtp\driver.py", line 307, in write_metadata_cache
File "site-packages\calibre\ebooks\metadata\book\json_codec.p y", line 136, in encode_to_file
File "json\__init__.py", line 251, in dumps
File "json\encoder.py", line 209, in encode
MemoryError


Question......is there an upper limit to how many books I can have on this device? If so, it would not surprise me at all to learn that I just have too many books.

Thanks for the help!
--Jim