Electram wrote:

...

Due to problems concerning to the unproperly use of "Kraftwerk" brand in the announcing of your shows, Karl Bartos had to cancel all your shows at USA. As you know, these shows were announced like Kraftwerk, or with the outstanding word Kraftwerk. Of course Bartos have all the rights to plays the Kraftwerk musics which he composed, but at his last concerts he (or the producers) was using the brand Kraftwerk unproperly.

According to Karl Bartos' manager himself (Thomas Koester) all 3 USA shows were cancelled because there have had trouble with the promoter.

Sorry, I did mean Karl Bartos' agent. Pardon. Apparently, the concerts will be rescheduled eventually. DER AUTOMAT