[Ashjuk]

One of the options for the header on a Kobo is the progress through the current chapter.

I have found that this seems to work for some epubs, but not others where it will only display the current position in the whole book. It appears that this is not uncommon as there is a note in the header settings on the Kobo stating that it might not work with some books.

I was puzzling over this so I opened a book that worked, and one that did not, in Sigil and tried to see if I could spot what made the chapter progress work. One thing I did note is that in the book that worked there was a populated toc.ncx file with navPoint references to the chapters of the book, but the one that did not work had an almost empty toc.ncx file.

Am I right in assuming that this is what is causing the problem of chapter progress not working?

Any ideas?