kMIDIInvalidClient The client is invalid. Declarationvar kMIDIInvalidClient: OSStatus { get } See AlsoError CodeskMIDIInvalidPortkMIDIWrongEndpointTypekMIDINoConnectionkMIDIUnknownEndpointkMIDIUnknownPropertykMIDIWrongPropertyTypekMIDINoCurrentSetupkMIDIMessageSendErrkMIDIServerStartErrkMIDISetupFormatErrkMIDIWrongThreadkMIDIObjectNotFoundkMIDIIDNotUniquekMIDINotPermittedkMIDIUnknownError