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FIX: Pro Tools “Could not create a new document because Assertion in…”

There’s an easy way to fix this Pro Tools error.

The Problem

Could not create a new document because Assertion in “/Volumes/Development/223020/ProTools/DFW/Views/UMenu.MacOS.mm”, line 1813. (Use the Copy button to copy this message to the clipboard.).

Pro Tools 2018 error

If you get this error, it’s likely due to Pro Tools trying to use the wrong audio interface.

The Fix

  1. Quit Pro Tools. (Not forever, just for a moment.)
  2. Restart Pro Tools while holding the ‘N’ key. This forces Pro Tools to ask you which interface to use.
  3. Select your interface.
  4. Boom. No more error, hopefully.

Caveat Emptor

This worked for me on a Mac Pro trashcan running macOS High Sierra 10.13.6 and Pro Tools 2018.7.0 on a Tuesday in November. The Moon phase was Waning Crescent. I had vegetable soup for lunch and was facing South at the time of the error. Your mileage may vary.

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