So I just tried on my Logic version 5.51 installed on my old computer running XP SP3 and UltraChannel works perfectly. I wonder if the bug does not come from version 5.30 on Windows 8, since we can not run the 5.51 version of Logic with this OS (!!!!). However, I'm afraid to reinstall the 5.30 version on my computer, for fear of losing or having to reinstall all my plugs in!
And even with version 2.10 of Asio4all, I still have the same error message. So if anyone has a solution for both problems …..!