Am Mittwoch, den 18.03.2020, 18:44 +0100 schrieb Bernd:
in the preamble, it says "not defined" (which should not be the case).
Either use it in the document body or in preamble within \AtBeginDocument{ ... } This is because biblatex needs to be loaded very late (after the user preamble). Jürgen Document body does not work, that's what I tried out first. But putting \AtEveryCitekey{\clearfield{url}} in a \AtBeginDocument{...} container works! Thank you very much. Kind regards, Bernd
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