Audio device manager failing in createAudioDeviceTypes coreaudio

Stand alone audio app in development, been working well up until my system rebooted due to a unconnected crash.
Restarted xcode, built and it failed asserted in a NSSelector call so I enabled the debugger and found it is in AudioDevice and the createAudioDeviceType with core io.
Rebuilt from clean. No fix. Other audio and DAW apps are working fine.
Anyone seen this before? Any hints?
Thank you

Well go figure.. fresh copy of xcode and we’re back to the races. You can’t make this stuff up!