XnView Software

How do I find all uncategorized images in any given folder? The Categories Filter "Uncategorized" returns all such instances in my entire library. I have tried the search feature, but specifying Categories as a condition, followed by "Does not contain Categories" returns all images (in the selected folder).

Find "uncategorized" is a missing feature ...

Workaround:
Select a small set of photos having or not categories for test
- Open "Create, File listing"
- Add in a first line (with double quotes)
- Add in a 2nd line (without quotes)
- Choose TXT format for output
- Do not use "include subfolders"
- Save result as test01.txt
Open this text file with a notepad , delete lines where categories exist, save result
- in XnViewMP , use "File, Open file list " and open this file : Uuncategorized files are now displayed.

If the method is correct for you , now you can select your whole set of photos like this :
- Select the root folder of your photos in the right pane of the browser
- Open "Create, File listing"
- Fields are already here
- Tick "include subfolders"
- Click "Save as" and choose a name for result, such as Result.txt
- Go and make yourself a cup of tea
- Come back and open Result.txt with a spreadsheet program
-Sort on Categories column , delete the lines where a category exists
-Save as result02.txt and open it as a "file list" in XnViewMP

Thanks Michel, it looked a little daunting but it works.