What does BTAudioSession and BTSmartRoutingDaemon mean?

App & System Services Core OS
RahulRS OP
Created Jan ’21
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When I run my watchOS app on a real device, It prints this in the console: 

Code Block 
watchOS Extension[313:21609] [BTAudioSession] ### Activate failed: kParamErr (### BTSmartRoutingDaemon not running)
watchOS Extension[313:21609] [BTAudioSession] ### Error: kParamErr (### BTSmartRoutingDaemon not running)


What is this BTAudioSession and BTSmartRoutingDaemon? There's nothing available with this name on Apple Developer Documentation neither somewhere on the internet.

Note: I am not using any third party frameworks.

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achim_b OP
May ’22

Same problem here... the app worked 1 year ago, did not change anything except update to Xcode 13. Works fine in Simulator, but not on real device.

2022-05-25 14:20:41.795736+0200 WatchAppPdTest WatchKit Extension[10126:4336297] [BTAudioSession] ### Error: kParamErr (### BTSmartRoutingDaemon not running)
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What does BTAudioSession and BTSmartRoutingDaemon mean?
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