kMIDIIDNotUnique The identifier you’re trying to set isn’t unique. Declarationvar kMIDIIDNotUnique: OSStatus { get } See AlsoError CodeskMIDIInvalidClientkMIDIInvalidPortkMIDIWrongEndpointTypekMIDINoConnectionkMIDIUnknownEndpointkMIDIUnknownPropertykMIDIWrongPropertyTypekMIDINoCurrentSetupkMIDIMessageSendErrkMIDIServerStartErrkMIDISetupFormatErrkMIDIWrongThreadkMIDIObjectNotFoundkMIDINotPermittedkMIDIUnknownError