[dc696969]

I subscribe to a published ebook in two formats - PDF and Mobi.
Prior to importing a new version of the book, I rename the current versions of the book to Book Title Vnn, where nn is the next sequential number.

I perform the rename in the Edit metadata screen and invariably get an error message which asserts that a Permission is denied. Sample error details are as follows:

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calibre, version 2.67.0
ERROR: Permission denied: Could not change the on disk location of this book. Is it open in another program?

Locked file: c:\users\xxxxxx\calibre\09 reference\paul thurrott\windows 10 field guide (250)\windows 10 field guide - paul thurrott.mobi

Traceback (most recent call last):
File "site-packages\calibre\gui2\metadata\single.py", line 552, in apply_changes
File "site-packages\calibre\gui2\metadata\basic_widgets.py", line 213, in commit
File "site-packages\calibre\db\legacy.py", line 810, in func
File "site-packages\calibre\db\cache.py", line 57, in call_func_with_lock
File "site-packages\calibre\db\cache.py", line 1039, in set_field
File "site-packages\calibre\db\backend.py", line 1448, in windows_check_if_files_in_use
File "site-packages\calibre\utils\filenames.py", line 385, in __init__
IOError: [Errno 13] File is open in another process: u'c:\\users\\xxxxxx\\calibre\\09 reference\\paul thurrott\\windows 10 field guide (250)\\windows 10 field guide - paul thurrott.mobi'
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As you can see, the error message states that one of the books is open in another process - But I don't have the file open in any other process intitiated by me.
Thanks