Error on trying to update Metainformations

[Zorro72]

Hi,
since a couple of weeks, I always get an Error prompt, when I try to update Metainformations for an ebook.

calibre, version 4.15.0
FEHLER: Unbehandelter Ausnahmefehler: <b>error</b>:(32, 'DeleteFile', 'Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird.')

(engl: The process can't access the file, because it's used by another process)

I can continue to click on OK and retry the update a couple of times, then it will be accepted on the third, sometimes fourth try.

I believe it's not a bug within calibre, but has to do with my installed Python or another Windows Library. (F.e. I installed Visual Studio, some months ago). Anyway I have no idea how to fix that problem.

I attached the error details below. Is there anybody who knows, how to solve my problem?

Thanks

calibre, version 4.15.0
FEHLER: Unbehandelter Ausnahmefehler: <b>error</b>:(32, 'DeleteFile', 'Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird.')

calibre 4.15  embedded-python: True is64bit: False
Windows-10-10.0.18362-SP0 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '10', '10.0.18362')
Python 2.7.16+
Windows: ('10', '10.0.18362', 'SP0', u'Multiprocessor Free')
Interface language: de
Traceback (most recent call last):
  File "site-packages\calibre\gui2\metadata\single.py", line 690, in next_clicked
  File "site-packages\calibre\gui2\metadata\single.py", line 615, in apply_changes
  File "site-packages\calibre\gui2\metadata\basic_widgets.py", line 408, in commit
  File "site-packages\calibre\db\legacy.py", line 806, in func
  File "site-packages\calibre\db\cache.py", line 62, in call_func_with_lock
  File "site-packages\calibre\db\cache.py", line 1122, in set_field
  File "site-packages\calibre\db\cache.py", line 1136, in update_path
  File "site-packages\calibre\db\backend.py", line 1621, in update_path
  File "site-packages\calibre\utils\filenames.py", line 471, in delete_originals
error: (32, 'DeleteFile', 'Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird.')

[theducks]

another program is accessing a file you want to delete. It may be another part of Calibre

Close (shutdown) the Viewer and/or the Editor. (these can have stand alone use)

[kovidgoyal]

Exclude the calibre library folder from your antivirus and any filesync programs such as onedrive/dropbox whatever.

[Zorro72]

Originally Posted by theducks

another program is accessing a file you want to delete. It may be another part of Calibre

Close (shutdown) the Viewer and/or the Editor. (these can have stand alone use)

I don't have anything open but Calibre Main Program and the Metadata Editor.

Originally Posted by kovidgoyal

Exclude the calibre library folder from your antivirus and any filesync programs such as onedrive/dropbox whatever.

Sounded prommising. So I did, but even after a restart, the problem still apears

[BetterRed]

@Zorro72 - Did you try running calibre in Safe Mode

Which anti virus software are you using?
Do you use cloud storage - Dropbox, OneDrive, whatever?
Is your library in your Documents folder?

BR