Dear Bruno and Nick, Many thanks to both of you for having taken the time to respond to my question.
Actually, my initial problem was in a larger document. There the links didn't work but I now think it was because I did something wrong. When writing to the list I wrote the toy example I sent and there, things seemingly didn't work but for the reason you both pointed out, namely that the document was too short. I did look at the generated HTML but not properly enough, I am really sorry about the trouble. Everything works fine now. Thanks again for your kind assistance, Shérab.
