Zenphoto version 1.5.4 (Official build)
Current locale setting: en_US.UTF8
PHP version: 5.6.40
Graphics support: PHP GD library bundled (2.1.0 compatible)
supporting: gif, jpg, jpeg, png, wbmp, webp
PHP memory limit: 4096M (Note: Your server might allocate less!)
MySQLi version: 5.6.45

I have logged into the web site after some time to try to sort out a query from the person running the web site.
If I click on Albums - I can see the list of albums with the number of albums and images in each.
When I click on image order, I can see all the images in that folder
I click on an individual album with, say, 50 images listed as being in it (and which I can see from the front end)
if I click on images I can't see any images - the album appears to be empty of images.
They are visible on the frontend but not in the backend.
I have never come across this before.
(the last time I logged in, some time ago, they were visible)

Thank you for any help you can offer,
Richard

I have no idea, it cannot really be that you see them on the frontend and not the backend… If it was a dynamic albums there would be no images on the backend but there would not be an images tab either. What do the logs say?

PS:

PHP memory limit: 4096M (Note: Your server might allocate less!)

Does your server really provide that much? That would be great of course ;-)

Thank you - the only problem reported in the logs were a couple of bare words in my adaptations in the template code - I corrected those - though I can't see that they would have affected the backend code.
But, whatever, I can now again see the images under the Albums - Images section - perhaps it was some sort of cache problem.
Now I can work on the actual problem reported to me!

Many thanks,
Richard

PHP memory limit: Does your server really provide that much?
Yes, it does.

All right. Sometimes it's the browser cache that plays tricks on you. The ZP backend does not use any page caching.

Also: Whenever you think albums or images don't match your files, use the "Refresh the database" utility. That forces to update/sync the db with the albums/images on the file system.

Now I can work on the actual problem reported to me!

Anything we can help with as well or your site specific?