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iGeneo

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Original poster
Been working well forever... latest beta began throwing this error. It's quite possible that it is not beta related.

Any ideas?

Logs are not of much help
 

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Is that the first time you've seen a TM error for that file? It's an odd file name and I wonder if that's part of the problem. If you exclude that file, does it back up successfully?
 
Same error for me. The current beta has been pretty much rock solid aside from this error and an inconsistent battery drain, which looks to be caused by spotlight doing something, and an inaccurate battery indicator when charging.
 
Same error here. I was running Beta 3, and everything was running smoothly, but since updating to Beta 4, I'm also getting this.

I've gone through multiple web searches on finding this "%@" file but have not made any progress. Spotlight and Terminal will not return any useful results.

M1 Mac mini
 
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There's hope that this will be fixed in the next one or two betas. Feedback Assistant says:

Time Machine / backupd fail: The file "%@" could not be backed up.

Recent Similar Reports: More than 10
Resolution: Potential fix identified - In macOS 12
 
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Hey guys, I just fixed this last week. I have OneDrive installed on my Mac, and I interrupted its sync once. Apparently it bumped some corrupted file, which leaded to this issue. Once I excluded OneDrive folder from TimeMachine the issue never happened again.
 
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Hey guys, I just fixed this last week. I have OneDrive installed on my Mac, and I interrupted its sync once. Apparently it bumped some corrupted file, which leaded to this issue. Once I excluded OneDrive folder from TimeMachine the issue never happened again.
Beautiful ! It worked for me too - thanks !
 
Not fixed for me. The error no longer comes up, but it just doesn't complete the backup and shows the previous successful backup time instead!
 
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