caebi

I have checked this now with the same reslut as before: “No matches found”.

But the think the problem is in fact the upload process. I added the images via ftp and with a plugin to set the first image as featured image.
After uploading via WorpdPress own media uploader and make it “featured” manually, everything works fine.

Thanks for your answer. I am sure I missed a detail. Do the images have to be in the same folder? Or do I have to use the user account that created the posts?