Hey Nancy,
That sounds like a real bundle of fun.
There will be other people around who knows more, than I do, about Avid running 23.976p.
A couple of questions:
What are your hardware specs, including the external drive?
Do you know what the audio was recorded on?
Did the “someone” who input the settings, also set up the project for you?
If you investigate the files that you are using, video and audio, what do the properties tell you?
And, where is the edit going once you have finished with it?
(Are you outputting for On-Line/conform somewhere else, or do they just want a flat master-file from you?)
Based on the setting that you are working to, I would not call it “off-line”. Depending on what the original footage shows, it may be that your footage has already been transcoded?
I suggest that your investigation should centre around frame-rate(s), and if the “Avid settings at 4KDCI Full 4096X2160 1:90:1 23.976P” are the right ones for you to use?
To get you moving, this recent thread on the COW may help you a small step closer to a solution:
https://creativecow.net/forums/thread/media-creation-settings-for-4k-project/
Good Luck – and please do let us know what the solution is when you get there.
Atb
Mads