XHTML - Unable to get Component Exchanges and Physical Links in output

Hello,

I want to generate Component Exchanges and Physical Links information in a HTML export but I am unable to generate this information and these elements do not appear in the “index” of the HTML export.

I have disabled all the filters in the Project Explorer.

The Component Exchanges and Physical Links appear “greyed” when I use the “HTML Documentation Generation on selected elements…” menu.
And there is an information saying that No HTML documentation will be generated for the greyed selected element :

However, everything works fine for Functional exchanges.

Is there something I can do to get Component Exchanges and Physical links in the output ?

I am using Capella v1.4.2 (I have the same issue with Capella v6.0.0).

Thank you very much in advance for answer or advice.