I have some serious problems with this combination. If i have two instances of komplete Kontrol vsts in Cubase and switch between the tracks, the keyboards does not have a connection to the right instrument anymore. If i use this little keyboard button in the software cubase often crashes. I never used that button before and i never had that error before. I have the komplete ultimate collectors edition and can't work anymore. I deinstalled all, installed komplete kontrol, kontakt, cubase new again nothing helped.