[Dan__]

First I enter the new author name, then hit apply or ok. All author names get updated and then this message appears:

calibre, version 5.16.0
ERROR: Failed: IOError: disk I/O error

Traceback (most recent call last):
File "calibre/db/backend.py", line 920, in execute
apsw.IOError: IOError: disk I/O error

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre/gui2/dialogs/metadata_bulk.py", line 174, in do_it
File "calibre/gui2/dialogs/metadata_bulk.py", line 286, in do_all
File "calibre/db/cache.py", line 72, in call_func_with_lock
File "calibre/db/cache.py", line 1209, in set_field
File "calibre/db/cache.py", line 1223, in update_path
File "calibre/db/backend.py", line 1665, in update_path
File "calibre/db/tables.py", line 134, in set_path
File "calibre/db/backend.py", line 927, in execute
apsw.IOError: IOError: disk I/O error