"Invalid project file" dialog when opening project


I have quite a few Cubase project files that have failed me lately. I have been quick to update between 12.0.50, to 12.0.51 and then 12.0.52. I don’t know if it is this change of version that have caused these problems, or not.
When attempting to open one of these files I get the error message “Invalid project file…”. I have attached one examples, but I have more.
Invalid project file Chicken - Jaco Pastorius_210405
Invalid project file Express Yourself - Lettuce (Moises 221105)

I’m running on Windows 10 Pro.

Best regards,
Express Yourself - Lettuce (Moises 221105).cpr (657.6 KB)

I can confirm the same error message with the file you uploaded.
Never had the same issue myself so sounds like something on your system is corrupting the files.

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Same here, neither C11 or C12 can open it. Same error message, also if I try to import the tracks from the project.
Do you have backup files from the automatic backup maybe? You could try those…

Never had a corrupted file here either, as far as I can remember. It shouldn’t be the problem of a newer version, but I have not idea what could have caused this, sorry.

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I am afraid that Cubase has corrupted your files and they are unrecoverable.

I had the same problem in the middle of a massive project which problem nearly caused me a coronary…

Cubase is full of bugs and it can be extremely unstable,

Save as regularly as you can, as ‘Save New Version’ , back up as much as you can,

In this instance, look at your back-up files, you might be able to rescue the project this way.

Sorry, I know this sucks but I had the same problem and never managed to recover the files, thankfully, I had backups that were adequate.

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Thank you for the replies. I cannot guarantee that it is Cubase causing these issues, but I have only had issues with Cubase project files this far, which makes me suspicious. I will be more careful with continuous backups from now on. All affected projects were rather small and new, so not the biggest effort to recreate them.

Again, appreciate the input!
Best regards,