TOC in responsive HTML5 has not hierarchy
Hello,
When I create a new book and new documents with the standard layout, the heading 1 heading 2 are automaticlly maped for the responive HTML5 (FrameMaker 2017)
Heading 1
___Heading 2
______Heading 3
The TOC in the left HTML does show the hierarchy.

When I try to use publish responsive HTML5 from my produtive book (91 Files, 3,400 pages) which was initially created 10 years ago with a FM6 version, the hirarchy does not work. On the first level, the FileName instead of the chapter is used.

Do you have any idea?
Regards Ingo
