How to fix Metadata file supplied is not a supported version [39] with an updated il2cppdumper

[Sbenny]

Disclaimer: This article is for informational purposes only. Reverse engineering, dumping, or modifying software you do not own or do not have explicit permission to analyze can violate terms of service and local law. The discussion below is intended to explain a tooling error and how researchers approach legitimate analysis of their own projects, internal builds, or software where they have authorization.

If you work with Unity projects that ship with the IL2CPP backend, you eventually run into a wall of tooling compatibility. One of the most common blockers lately reads like this:

System.NotSupportedException: ERROR: Metadata file supplied is not a supported version [39]

It usually appears when you feed a newer game build into a familiar workflow and it refuses to cooperate. You have your global-metadata.dat and your libil2cpp binary, you point your dumper at both, and it throws this error before it generates anything useful. The short version: the metadata format advanced, your tool did not. The longer version has more moving parts, and understanding them will save you a lot of time.

What il2cppdumper is and why it exists


Unity projects can be built either with the Mono backend or with IL2CPP.

Keep reading here: How to fix Metadata file supplied is not a supported version [39] with an updated il2cppdumper

Did it help you? Let me know below!

 

[Snailsoft]

This is typical of external dumpers, however, newer internal .so versions hook into the data after it is loaded.
The Xlibtool I employ is a library one adds to the apk and I have yet to see it throw this error.

 

[Snailsoft]

Too, Roddroids Android native dumper v6.1 resolves this on its own.
That is an external version where the lib and data are extracted.

GitHub - rodroidmods/rodroid-il2cppdumper: Rodroid-il2cppdumper is a tauri app cross platform for both ios and desktop

Rodroid-il2cppdumper is a tauri app cross platform for both ios and desktop - rodroidmods/rodroid-il2cppdumper

github.com

 

[Sbenny]

Thanks man!

 

[Snailsoft]

Thanks man!

If you would, please test this on one wherein the error occurred and see if the newest version resolves the issue.

 

[dwdawdqaw]

What should we do if the guy encrypted it? Key needed

 

[dwdawdqaw]

 

[Snailsoft]

What should we do if the guy encrypted it? Key needed

That is an entirely different topic unrelated to this thread.
Please start a new thread about needing help with encrypted il2cpp data.

 

[lihaiyanz]

Thanks for sharing, it's what I wanted.