Not found - error: out of memory

I'm working with a legacy system FCP 6.0. I have an uncompressed project that I want to re render. The system is too slow to actually play these uncompressed video file assets, but I've rendered the movie before (2008) so it shouldn't be a problem now. The computer has just been in storage all of these years. The problem is that when I open the project file, I can't see the timeline. I go to WINDOW > TIMELINE and it's greyed out. I double click the timeline file in my assets and that's when I first get "file not found" and then when I close that out I get "error: out of memory". I tried opening older versions of this project (to see if my most recent file was corrupted in some way) but still get the same error. So that leads me to believe that this "file not found" error is really just a memory problem. Also the timeline file found in my assets does not have a line through it (as if it was missing).
I tried restarting. No luck.
What would you suggest I try to get the timeline to appear?

You may have a drive that is going bad. Copy to a new drive. Leaving a computer in storage for an extended period of time is never a good idea, parts go bad on electronics even when not in use.

Run Disk Utility to Repair all drives. Run Disk Warrior to repair the directories on all drives. If both run fine with no serious issues, move forward, your drive is good.

It sounds like you may have a corrupted project file. If you have issues with the backups, I'd move it all to a different Mac and try it out. Just move the drive into a different Mac, like a legacy Mac Pro or something.

That is a serious corrupting, assuming you have all the original media still on that drive. Could you actually have media physically missing?

If you rendered that project in 2008, it has been 8 years, and things go bad on drives and in computers over that long of a time.

I solved the problem.
Tools > Render manager > check off files then delete.
Drives actually don't go bad from just sitting in storage.