[nindotza]

In Calibre 4.13 I am having problems linking up the table of contents page and seeing an error with a file generated by calibre. When I run the check book function there are no errors. However, at the bottom of the File Browser in the left side bar under Miscellaneous. I see a file that Calibre created "nav.xhtml" perhaps that got created while I made a TOC and generated a TOC using the function insert inline table of contents. There is an icon displayed there of a human person slipping, like a sign for "Slippery when Wet", it is orange color. When I hover over that it says

This file contains the metadata table of contents. This file is a text file not referenced in spine.

Is the "spine" in the metadata.opf file? The node for manifest shows as:
<manifest>
...
<item href="toc.ncx" id="toc" media-type="application/x-dtbncx+xml"/>
<item href="toc.xhtml" id="id67" media-type="application/xhtml+xml"/>
</manifest>

<spine toc="toc">
<itemref idref="titlepage"/>
<itemref idref="id64"/>
<itemref idref="id65"/>
<itemref idref="id67"/>
<itemref idref="id66"/>
<itemref idref="id62"/>
<itemref idref="id63"/>
...

So, should I add <itemref idref="toc"/> to the spine node?