Some additional informations (I started the forum thread at hilfdirselbst.ch Uwe Laubender mentiones): Meanwhile I've made a complete de- and new installation of all Adobe CC apps, that didn't change anything, the bug remains. There is some strange behaviour of Indesign: depending on what file I choose as style source in the book panel, the exported PDF changes: always in the file that I choose as style source the .ai file is exported perfectly, in all the other book files the .ai files are exported as low-res bitmaps.
Gunther
Some additional informations (I started the forum thread at hilfdirselbst.ch Uwe Laubender mentiones): Meanwhile I've made a complete de- and new installation of all Adobe CC apps, that didn't change anything, the bug remains. There is some strange behaviour of Indesign: depending on what file I choose as style source in the book panel, the exported PDF changes: always in the file that I choose as style source the .ai file is exported perfectly, in all the other book files the .ai files are exported as low-res bitmaps.