#1  HUSTLA716 05-08-2019, 07:12 PM
Good Afternoon. I am uploading my first book on IngramSpark and I am receiving this error. Can someone help? This is my first time uploading a book. I am using Sigil and Calbre for ebook assistance. This is the last step before I finish. Help is appreciated.

[ERROR]metadata.opf: 15,10: element "spine" missing required attribute "toc"

#2  rcentros 05-08-2019, 08:44 PM
Unfortunately I don't know anything about Sigil (or making books in Calibre) but there are forums for both on this site (further down).

My guess, just going by my very limited book compiling experience with AsciiDoctor, is that the "binding" document that holds links to all the chapters, doesn't have Table of Contents attribute defined. That's one of the things I had to do in AsciiDoctor when compiling my sample book.

#3  theducks 05-08-2019, 11:08 PM
Not an expert, I just reversed engineered a working book

There are 2 entries in the EPUB2 books OPF

 <spine toc="ncx">
... <itemref idref="HTMLTOC"/> <<<links the filename assigned in the manifest
and a Guide entry for the inline TOC (if used)
<guide> <reference type="toc" title="Table of Contents" href="Text/06_CONTENTS.html"/>

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