Thank you awesomeaudio for good information.
That would seem to be a likely cause of the problem. I re-imported Generic Remotes from Cubase 14, but this does not help.
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I also strongly agree that the Remote Devices (legacy) Generic Remote should not be removed from Cubase but rather developed further.
I don’t think the user should have to do any programming work that isn’t directly related to composing music, mixing a movie, etc., which I think is programming and making the control surfaces and knobs work in Cubase is. At least I don’t have the time to learn any of that stuff, let alone the interest in learning that kind of programming.
I’ve already wasted half a day trying to figure this out. At first I thought I had broken the system myself, but now it turns out that I hadn’t. Not to mention where the hell the inspiration to make music went…