I'm so sorry. Apparently not only was I not specific enough, but rather misleading too with what little info I gave.
I wasn't talking about the inline TOC, but the normal epub TOC. As in, "Tools --> Table of Contents --> Edit Table of Contents --> Select all --> Remove all selected entries (recycle icon) --> Generate TOC from major headings"
That's the steps. I don't need an inline TOC, and don't mess around with the NCX and similar files.
Starting the main calibre in debug mode and then opening the editor does not work. And I don't think there's a debug mode option in the gui of the editor itself (or at least I haven't ever seen it), so that's why I didn't think of adding a debug log to my post. My bad.
Starting command line debug mode using this:
Code:
[calibre-debug --edit-book
got me:
Code:
Segmentation fault (core dumped)
That's really all in terms of error message I get in the debug.
But here's the whole of it if you'd rather:
The operating system I use is Ubuntu Mate 16.04.5 LTS 64-bit by the way.