A PDF file created by bookcmd=render_article&writer=rdf2latex contains a lot of errors. This task replaces T121349 detail #9.

The templates Übung4 and Übung4 Lösung aren't shown at all. Therefore the reader cannot see where a specific exercise (Übung) or solution (Lösung) starts and ends.

Maybe the same problem T73808 using wikitables. If so, it's one more reason to fix it urgently.

How to check the problem

1. MathML in user preferences / appearance.
2. de-Wikibooks chapter "Komplexe_Zahlen/_Darstellungsformen" - the requested page (Internet Explorer 11 isn't able to show correct formulas using MathML)
3. Use Print/Preview/Print of the browser (here: Firefox 42.0) - every part of the page is printed correctly (IE isn't able to show any formulas)
4. Use Special:Book render_article rdf2latex and store the created pdf file.
5. Appendix 1 F3079535 is the created pdf file without any change.
6. Appendix 2 F3079554 shows the error described above.

More errors are described in other tasks. (In appendix 2 there are additional faults caused by convertion to OpenOfficeGraph odg but irrelevant to MediaWiki problems.)