Thanks for pursuing this :) No, I'm not using USB 3. I believe the issue only manifests when Code Composer is running, not necessarily in active debug mode, but simply being up. So a basic scenario and a work-around would be: Start Code Composer; Plug in the EVB; Run a serial console (I'm using Termite) Hit 'Debug' in CC Write some stuff in the console Hit 'Stop Debug' in CC Disconnect and re-connect the serial console --> occasionally, the console will not be able to open the port Close Code Composer Re-connect console --> Now this works I guess that under some conditions, CC does not cleanly release the port when stopping the debugger.
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