It was the line below that was the cause. When I selected the image to be the top level "
Theme Image" thumbnail I selected it from the D: drive which is the
copied images from the linked folders on the "
WHS4" server that you see referenced in albumfiles.txt file above.
I have done this for years with no problem but something has changed somewhere that means this now creates an error. So I changed the "
Theme Image" thumbnail to come from the source linked files on the WHS4 server. This fixed the issue in both my albums.
Bit of a nightmare when the logs give not hint where the problem is.
So the reference in albumfiles.txt changed from:
-20220920_182329.jpg D:\jAlbum\My Albums\Justin's Albums\album\2022\2022-09-15 Barcelona\20220920_182329.jpg 1707315138 1663694609
to
-20220920_182329.jpg \\whs4\jAlbum\Justin's Album\2022\2022-09-15 Barcelona\20220920_182329.jpg 1770064098 1663694609