After adding the latest song to a music mix I am working on, I tried to play the audio, but it said “out of memory.” I should have deleted that last track before closing the project. After reopening it, I get this: https://ibb.co/cyf29Rq
After hours of work, the audio is seemingly gone. What do I do???
Start Over. Do Not try to reuse or patch the existing project. Once a Project crashes or becomes unstable, that’s the end of the world.
If you have the only known interview with the Governor in there, we can wait for Jademan and you two work out how long it’s going to take for him to rescue some of the sound.
You have the advantage of mixing with existing songs, so it’s a simple matter of rebuilding the show. As a rule, any original content is lost. So if you did the announcing between songs, you’ll be announcing again.
You didn’t say which Audacity you had.
Koz
Listen to koz.
Read this thread (all the way through): https://forum.audacityteam.org/t/can-you-troubleshoot-missing-audio-data-block/62479/1
We have a few more tools that we did just a week ago - but still quite far from what is required. If you want to pursue this, download, then run Powershell. Then “cd” (change directory) over to your project_files directory and type the following command:
Get-ChildItem *.au -Force -Recurse | Select-Object Name, CreationTime, LastAccessTime, LastWriteTime, Mode, Length | Export-Csv KaeH.csv
Use Copy/Paste for this command. Then type exit to exit.
zip up your .aup file and upload it to a file sharing service; repeat for your “KaeH.csv” file, then post the links for the two files.
I’ll take a look at it - if there are any results it will require a lot of additional work on your part, but at least we can move forward.
Consider moving backwards. 
OK. Got it. There is a _DATA folder, so it’s Audacity 2.
Describe the show. Jademan may need to recognize scattered and partial music and show fragments and be able to know what he’s looking at.
Is there a music playlist? A text file with the song titles in order of appearance?
Koz