The operation couldn’t be completed. (com.apple.ShazamKit error 300.) I get this error when I try to add multiple shazamcatalogs on a single SHCustomCatalog. The fact that the operation is called add(from:) and not 'load' lets me suggest that it's meant to use that way. Am I wrong? And yes, both work work if I just add one at a time. let catalog = SHCustomCatalog() do { try catalog.add(from: url1) try catalog.add(from: url2) {...} } catch {...} . . Also, fun fact: I was working on a ShazamKit myself before dubDub and it's a really fascinating topic and so awesome to see how well it works, great job! 👏