Image Files Error

“All image files associated with the SPL document must be actually referenced from that SPL document”

This means the images in your xml are not correctly referenced. This error usually happens when images are added and deleted from the xml without the new files being correctly named. So where the xml has a reference to an image, the image name it is trying to reference cannot be found because the images are not correctly named. It’s the same reasoning if you changed the name of a chapter in a book, but did not update the table of contents.