XnView Software

Today I noticed my category list does not show any more. I have to admit that I did receive error messages in the past (catalogue file could not be opened) which I could not solve, but I could see the list I made all the time. But today I could not find any category at all. I attach a screenshot of the error.
I checked the location of de catagory db which seems OK to me (some 145Mb last change today).
What could have gone wrong and how could it be to repaired?
I make a daily backup of my Xnview.db

could you send us the xnview.db by mail?

Dear Pierre,

Sorry for the delay in reply to your reaction on my post, but I had some serious personal priorities higher than working on my photos.
I'll be glad to send my Xnview db by mail but what is the address and what reference do I give it?
Frans

Fres wrote: Sun May 11, 2025 3:33 pm what is the address

run app, press F1 - find email address

however, you can try to do it yourself:
XnViewMP - catalog - relocating folder

Thanks user0 for your assistance. But I haven't changed the base location of my photos for a long time. So I see no need to apply the conversion of the path as you suggested.
Only recently the category list is empty. When I now look at the files presented in the cateloque they all have a size of 0 bytes. Re attached screenshot.

I have sent the Xnview.db via Wetransfer, but the file hasn't been downloaded sofar. Ultimate date is TODAY!

Fres wrote: Thu May 15, 2025 10:50 am I have sent the Xnview.db via Wetransfer, but the file hasn't been downloaded sofar. Ultimate date is TODAY!

Sorry please send me it again?

Will do

Please refer to screenshot sent of filelocation and find attached screenshot with (part of) files in location on my desktop I:/Foto's/Nikon/Basis-JPG/Nrd_Spanje (more files and with content than presented by Xnview; only 14 files)
Frans