[digikam] [Bug 367784] New: Thumbnails Disappear After Tagging

[Don via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367784

            Bug ID: 367784
           Summary: Thumbnails Disappear After Tagging
           Product: digikam
           Version: 5.1.0
          Platform: MS Windows
                OS: MS Windows
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Thumbnails
          Assignee: digikam-devel at kde.org
          Reporter: 7mgte at miniblue.net

I inadvertently stumbled into this problem when tinkering with tags.  I had
selected several pictures and selected a tag (I was actually going to search
for pictures with a tag).  When the tag (metadata) was applied the thumbnails
disappeared.  I am not exactly sure how to rescan thumbnails in a selected
folder to see if I can restore the thumbnails.

The thumbnails do not return if digiKam is closed and restarted.  The problem
is repeatable.  If I select the now thumbnail-less image and select preview,
digiKam responds with the message "The storage location of this image is
currently not available."  The image file still exists in the Windows directory
structure and the date modified time appears unchanged.

My suspicion is a problem with the thumbnails database, but I am not sure how
to go about diagnosing this further.  The thumbnails-digikam.db file appears to
be updated based on the modification time of the file.  My photos folder is
located on a network drive (u:\media\photos) and I understand there are issues
using digiKam with a NAS.  However, this problem did not exist under digiKam
4.12 on Windows 10 (64-bit).  (Or earlier versions of digiKam running on Win
10, Win 8.1, and Win XP).

Any guidance will be greatly appreciated!

Don

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