> I presume that you are attempting to export multiple org files at the
> same time.

Yes.

> Such functionality is covered by Org publish.
> Org publish allows generating a sitemap, which is another word for TOC
> in a multifile export. See 14.1.7 Generating a sitemap section of Org
> manual.

I'm using org publish, but the sitemap does only collect the titles from 
org files but I want the complete toc of each file and as far as I 
undesrand this is not possible with sitemap?

> If you are exporting a single Org file that is using contents of
> multiple #+include'd files, you can use the normal TOC generation as
> described in 13.3 Table of Contents section of the Org manual.

But this forces all the content into a single file, no?

Thanks for the suggestions!