Hello,
thanks for the quick response. I think to explain more in detail
1. System: Windows 10 / Calibre 8.3.0
2. Testfile
https://www.uni-muenster.de/imperia/...ungen_pdfa.pdf
3. Preferences (see pictures 001,002,003)
4. Resluts with "Embed metadata" (004) and "Interface Demo Plugin" (005)
I also use PDF-XChange Editor.