Lost audio output on a project

[alan933]

I was recording and playing this project the last time it was open.

Today I see the meters registering during playback but no sound out. The tracks are not muted.

When I export the project (3 audio tracks) to a wav file it plays fine.

I opened another similar project with 3 audio tracks and it plays fine. 

What setting is preventing the audio out? Even when I play the plug-in instrument tracks they register on meters but no sound.
The plug-in instruments have sound on the other project

Edited September 15, 2023 by alan933

[alan933]

never mind , figured it out, somehow the output on the A bus got set to 3&4 on my midi interface when its using 1&2. I don't know how this happened when I saved and closed the app last time after I just checked it.

[John Vere]

First thing I looked at because it explains the issue. It’s weird that it changed on you however that’s not normal!