With Aurora(n)HD, getting AAE1125 errors on launch or ProTools

There can be a variety of reasons for this error. Some things to check:

* Is the Aurora(n) set to the same Sync Source and Sample Rate as it was the last time ProTools was open?

* If the Aurora(n) is set to 192KHz, try changing it to a lower sample rate before launching ProTools.  

* Sometimes Audio Midi Setup can "hijack" the Avid card, and prevent proper loading of ProTools. Try removing these two files, empty trash, and reboot:

Library/LaunchAgents/AvidAudioServer.plist and Library/LaunchDaemons/com.avid.AvidAudioServiceHelper.plist