[KevinH]

I edited your post and removed the huge inline image. Simply attach individual images to your post, do not inline them.

For what it is worth, ... go to Sigil Preferences and turn on BookBrowser showing full paths instead of short names, that way we should be able to see more info.

And yes from your previous issue no file existed in the Images folder in BookBrowser with that name. Was that particular file ever part of the epub? Could you have left it out by mistake?

One thing to try is to save the epub to a *new* file name, then unzip the resulting .epub file and manually inspect the resulting unpacked epub to see if that file really exists someplace.

But in general, directly editing the opf spine is probably not the best idea. The Text folder in BookBrowser depends on it and shows you the files in spine order and allows you to drag and drop to change that order.

Only directly edit the OPF is you are absolutely sure you know what you are doing. And understand that commenting something out in the OPF is just the same as deleting it, since the OPF deletes all comments.