XnView Software

Thank you very much Pierre for your great support!
My problem is solved.

The cause was the attempt to search for empty fields in the XMP-area by using XMP->Field.
Thanks for the hint to use the custom fields directly from the drop-down menu instead. E.g. "XMP->Custom field 2" with operator "is ...

Thank you for looking at the problem.
Attached the samples.
Thanks

Thank you very much for your support!

Unfortunately, I cannot confirm the correctness of the fix.
Did I use the function incorrectly?
I’m using version 1.8.7, date Mar 26 2025

Here are the steps I took.
Setup: 10 images, 3 with some text in custom field 2.

Evaluation: Correctness of the field ...

XnView MP offers the option of saving metadata in the XMP-area. I use CustomFields1 to 10 here, which means that searching and assigning to categories also works without any problems.
I use Tools -> Search with condition XMP - Field.

One question arises: How can I search for images that have no ...