I will give system specs next, and detail the diagnostic steps I have taken to date. My work currently requires that the Avid Video Engine is instantiated. The problem happens regardless of system load, but happens more severely and quickly in a PT Session with higher loads touching more subsystems. On occasion, a power down/up of the UFX II allows work to continue. However, once the problem has occurred, in most cases the destabilization seems to linger on some level of the system. At this point, the system wide timing becomes corrupt as I described earlier.īecause Pro Tools is coded in a way that restarting the UFX II results in system failure, the session must be restarted. In Pro Tools 12.8.2 this manifests initially as what I interpret from the USB Diagnosis as incrementing 'drops,' numbering up usually to a few hundred, before eventually entering the gapping-state and displaying the FiFo Error.

The specific character of the glitch is a gapping of playback accompanied by a loss of timing sync that manifests system wide (for instance, playback timing of video files slows).

Per the subject of this topic, I have experienced persistent and difficult-to-diagnose FiFo errors, which result in the UFX II entering a state of glitching.

Macrium reflect broken pipe error