Generated TOC links go to wrong place

[brendontowle]

I'm told that this is user error (https://bugs.launchpad.net/calibre/+bug/2074284), so I'm checking here.

I'm trying to generate a TOC using Calibre 7.10, for an ePub that has very well-formed chapters and chapter/section headings. In the tutorial at https://manual.calibre-ebook.com/con...le-of-contents, I found these instructions:

Then, we set the options as:

Level 1 TOC : //h:h1
Level 2 TOC : //h:h2

This will result in an automatically generated two level Table of Contents that looks like:

Chapter 1

Section 1.1
Section 1.2

Chapter 2

Section 2.1

Using those instructions, I do get a two level ToC that looks like that, but: all of the section links, when clicked on, send you to the start of the chapter, not the section itself. And, sure enough, when I look at the data in the generated toc.ncx file, I see this:

<navPoint id="uIXA2jfX6ChloBsjmNnSAg9" playOrder="2" class="chapter">
<navLabel>
<text>1月</text>
</navLabel>
<content src="OPS/chapter-2_split_000.xhtml"/>
<navPoint id="uqfPktaL93cTQmqLLO4idQ3" playOrder="2" class="chapter">
<navLabel>
<text>1月1日</text>
</navLabel>
<content src="OPS/chapter-2_split_000.xhtml"/>
</navPoint>
<navPoint id="utq9DOX7bB9u69KAIm5i7y2" playOrder="2" class="chapter">
<navLabel>
<text>1月2日</text>
</navLabel>
<content src="OPS/chapter-2_split_000.xhtml"/>
</navPoint>

Note that the src link for each of the contained navLabels points to ...split_000.xhtml. But, the actual header elements for the contained navLabels are not in ...split_000; they're in ...split_001, ...split_002, etc.

So. What do I need to do to convince Calibre that I actually want the section links to point to the sections themselves, and not to the chapter?

[DNSB]

You will need to either split the files at the sections or use IDs to locate the section headers. All your current links are pointing to the same file which suggests that your sections are in the same file as the chapter header with no way to differentiate them.

  <h1>Chapter 1</h1>

  <h2 id="section0001">Section 1</h2>

  <h2 id="section0002">Section 2</h2>

  <h2 id="section0003">Section 3</h2>

  <h2 id="section0004">Section 4</h2>

  <h2 id="section0005">Section 5</h2>

  <h2 id="section0006">Section 6</h2>

<navMap>
  <navPoint id="navPoint1">
    <navLabel>
      <text>Chapter 1</text>
    </navLabel>
    <content src="Text/Section0001.xhtml" />
    <navPoint id="navPoint2">
      <navLabel>
        <text>Section 1</text>
      </navLabel>
      <content src="Text/Section0001.xhtml#section0001" />
    </navPoint>
    <navPoint id="navPoint3">
      <navLabel>
        <text>Section 2</text>
      </navLabel>
      <content src="Text/Section0001.xhtml#section0002" />
    </navPoint>
    <navPoint id="navPoint4">
      <navLabel>
        <text>Section 3</text>
      </navLabel>
      <content src="Text/Section0001.xhtml#section0003" />
    </navPoint>
    <navPoint id="navPoint5">
      <navLabel>
        <text>Section 4</text>
      </navLabel>
      <content src="Text/Section0001.xhtml#section0004" />
    </navPoint>
    <navPoint id="navPoint6">
      <navLabel>
        <text>Section 5</text>
      </navLabel>
      <content src="Text/Section0001.xhtml#section0005" />
    </navPoint>
    <navPoint id="navPoint7">
      <navLabel>
        <text>Section 6</text>
      </navLabel>
      <content src="Text/Section0001.xhtml#section0006" />
    </navPoint>
  </navPoint>
</navMap>

[JSWolf]

Before posting an error report, make sure you are using the latest calibre in case the error has been fixed.

[brendontowle]

Originally Posted by DNSB

You will need to either split the files at the sections or use IDs to locate the section headers. All your current links are pointing to the same file which suggests that your sections are in the same file as the chapter header with no way to differentiate them.

The whole point of my post is that they're not in the same file; all of them are in different files. See what I said about ...split_000, split_001, etc.

[brendontowle]

Originally Posted by JSWolf

Before posting an error report, make sure you are using the latest calibre in case the error has been fixed.

I just confirmed that the same issue is present in 7.15.

[brendontowle]

I've attached the .epub I'm trying to convert if that's helpful to anyone.

[DNSB]

For what it may be worth, your ePub did not contain any section files with names such as whatever_split_0001, see the attached image. I took a couple of seconds to open the file in Sigil and use it's ToC tool to regenerate the ePub3 nav document and the ncx ePub2 nav document for the h1/h2 header items. It seems to move to the section headers now in Sigil and calibre's viewer.