The German musician was due to attend the event at a university in Birmingham, England this week (beg19Jan15) to read extracts from his memoir and take part in a question-and-answer session.
However, organisers have now revealed the reclusive star failed to attend.
Aston University's Uwe Schutte, who put the event together, tells the Bbc, "He did not turn up. It's disappointing, but that's what you expect from Kraftwerk."
Attendees at the conference included Everything Everything bassist Jeremy Pritchard.
The stars of Kraftwerk are due to pick up a Lifetime Achievement prize at the Grammy Awards in Los Angeles on 26 January (15).