Hi Patrick,
I used acrobat reader version 9.5.5. Just installed version 10.1.4 but there is still no window openning when I click on the hyperlink.
The idea to create a html page (with possibility for navigation) seems to be the only way. Unfortunately I'm running out of time. This whole gui is part of a seminar paper that has to be handed in in a few days. So I will document this problem for students who will carry on with this project.
Thank you very much for your efforts to find a solution for this problem.
Best regards
Daniel