Pro Tools | Carbon — 11/9/20 2
Known Issues
The following sections document known issues you may encounter when using Pro Tools | Carbon, along with workarounds if they
exist.
Connection Issues
Pro Tools | Carbon does not appear in the Audio MIDI Setup Network Device Browser. (PT-260096, PT-264351, and PT-266482)
When opening Audio MIDI Setup and navigating to the Network Device Browser, Pro Tools | Carbon may not show up even though it
is properly connected and powered on. The most common reason for this issue is lack of AVB support on the network connection be-
tween Pro Tools | Carbon and the Mac. Make sure you have performed all recommended optimization and troubleshooting steps includ-
ing verifying that the Mac is directly connected to Pro Tools | Carbon with a compatible Ethernet cable and, if applicable, an AVB-com-
patible Thunderbolt to Ethernet adapter; verifying that AVB/EAV Mode is enabled on the Mac network interface; changing network
ports on Pro Tools | Carbon and Mac; and rebooting both Pro Tools | Carbon and the Mac. In rare cases, Pro Tools | Carbon may become
unavailable in the Audio MIDI Setup Network Device Browser after installing software that includes macOS kernel extensions, such
as Avid EUCON or the Avid HD Driver (not required for Pro Tools | Carbon). If you encounter this issue, refer to possible solutions at
www.avid.com/carbon-support. In extreme cases this issue may require either disabling System Integrity Protection on the Mac or, al-
ternatively, re-installing macOS over the current installation using the Mac’s Recovery partition (for information on macOS Recovery
mode, see https://support.apple.com/en-us/HT201314).
Pro Tools does not recognize a connected Pro Tools | Carbon after powering on. (PT-266468)
After booting Pro Tools | Carbon and quickly launching Pro Tools, Pro Tools | Carbon may not be recognized by Pro Tools. This should
not occur if you wait for 1–2 minutes between powering on Pro Tools | Carbon and launching Pro Tools.
“Pro Tools cannot communicate...” message appears after updating Pro Tools | Carbon firmware or after enabling Pro Tools |
Carbon in the AMS Network Device Browser while Pro Tools is open. (PT-264470, PT-266750, and PT-261459)
After updating Pro Tools | Carbon firmware, Pro Tools may display one of the following messages:
“Pro Tools cannot communicate with the selected Playback Engine device. Please quit Pro Tools, reconnect the unit, and then
relaunch Pro Tools.”
– or –
“Pro Tools cannot communicate with Pro Tools | Carbon. Please quit Pro Tools, reconnect the unit, and then relaunch Pro Tools.”
If this occurs, disconnect from any VPN, verify that Pro Tools | Carbon is connected to the Mac AVB and that the NET light is illumi-
nated on Pro Tools | Carbon, then re-launch Pro Tools. Similarly, if Pro Tools is launched on a system with Pro Tools | Carbon attached
but not yet enabled in the AMS Network Device Browser, an initial dialog prompting the you to enable the device appears. When then
enabling Pro Tools | Carbon, an error dialog may appear and you must quit and relaunch Pro Tools.
VPN may disconnect unexpectedly when connecting Pro Tools | Carbon. (PT-264788)
If you are connected to a VPN (Virtual Private Network) when you are connecting to Pro Tools | Carbon, you may lose connection to
your VPN intermittently. The computer’s network connection behavior can vary with different VPN configurations and with different
VPN client software. VPN connections are not recommended when using Pro Tools | Carbon.
Internet connection may be lost when connecting Pro Tools | Carbon. (PT-264712)
When connecting Pro Tools | Carbon to your system, it is possible to lose the internet connection for that system. If this occurs, change
which physical ports you use to connect Pro Tools | Carbon.
Disconnecting Ethernet to Pro Tools | Carbon requires some time to respond. (PT-261395)
If the Ethernet connection to Pro Tools | Carbon is disconnected while in use, Pro Tools can require as much as one minute to either post
a warning message instructing you to quit Pro Tools, or to fully quit after clicking
Quit when prompted.
If you encounter issues with Pro Tools | Carbon, visit the Troubleshooting Pro Tools | Carbon article on the Avid Knowledge Base.
If you are unable to resolve the issue, please open up a Support Case.
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