#593 ERROR: Unsupported Method

[Anique Naushad]

Hi,

I'm getting this error while trying to extract a file, Could you please let me know how to resolve this?

7za.exe x "C:\local\VisualVM 2.1.10.7z" -o"C:\local\" -bd -y -aoa

7-Zip (a) 22.00 (x64) : Copyright (c) 1999-2022 Igor Pavlov : 2022-06-15

Scanning the drive for archives:
1 file, 16852651 bytes (17 MiB)

Extracting archive: C:\local\VisualVM 2.1.10.7z
--
Path = C:\local\VisualVM 2.1.10.7z
Type = 7z
Physical Size = 16852651
Headers Size = 5503
Method = 0A LZMA2:24 BCJ SPARC
Solid = +
Blocks = 5

ERROR: Unsupported Method : platform\modules\lib\aarch64\jnidispatch-nb.dll
ERROR: Unsupported Method : platform\modules\lib\aarch64\linux\libjnidispatch-nb.so
ERROR: Unsupported Method : platform\modules\lib\flatlaf-windows-arm64.dll
ERROR: Unsupported Method : platform\modules\lib\libflatlaf-macos-arm64.dylib
ERROR: Unsupported Method : visualvm\lib\deployed\jdk16\linux-aarch64\libprofilerinterface.so

Sub items Errors: 5

Archives with Errors: 1

Sub items Errors: 5

7-Zip version :- 24.08.00.0

Thanks,
Anique

[Igor Pavlov]

you used old version 7za.exe 22.00 that doesn't support arm64 filter method:

7-Zip (a) 22.00 (x64)

note that 7za.exe and 7z.exe from 7-Zip are different files.

[Anique Naushad]

But I have latest version of 7-zip installed on my PC:-

PS C:\> get-addRemoveSoftware -ApplicationName '*7-zi*'
AppName                   Version    NormalizedVersion InstallDate
-------                   -------    ----------------- -----------
7-Zip 24.08 (x64 edition) 24.08.00.0 24.8.0.0          10/12/2024 12:00:00 AM

Doesn't 7za.exe upgrade along with the application?

[Igor Pavlov]

7za.exe is not part of main 7-zip package.
7za.exe is external reduced command line version that supports only main archive formats: 7z, zip, tar, gz,bz2, xz,zstd,cab,tar.

You can dowload new 7za.exe here in "7-Zip extra" package from:
https://7-zip.org/download.html

[oceanpure]

This error also occurs when extracting the msys2-base-x86_64-latest.sfx.exe file.

File: https://github.com/msys2/msys2-installer/releases/download/nightly-x86_64/msys2-base-x86_64-latest.sfx.exe

Extracting test & output (I also tested v26.00, 25.01 of 7z.exe. It's same):

7z.exe x msys2-base-x86_64-latest.sfx.exe msys64\*.exe -o"%cd%"

7-Zip 26.01 (x64) : Copyright (c) 1999-2026 Igor Pavlov : 2026-04-27

Scanning the drive for archives:
1 file, 52926208 bytes (51 MiB)

Extracting archive: msys2-base-x86_64-latest.sfx.exe
--
Path = msys2-base-x86_64-latest.sfx.exe
Type = 7z
Offset = 424960
Physical Size = 52501248
Headers Size = 121016
Method = Delta LZMA:20 BCJ2 04F71101
Solid = +
Blocks = 5

ERROR: Unsupported Method : msys64\clang64.exe
ERROR: Unsupported Method : msys64\clangarm64.exe
ERROR: Unsupported Method : msys64\mingw32.exe
ERROR: Unsupported Method : msys64\mingw64.exe
ERROR: Unsupported Method : msys64\msys2.exe
ERROR: Unsupported Method : msys64\ucrt64.exe

Sub items Errors: 6

Archives with Errors: 1

Sub items Errors: 6

[Sam Tansy]

This particular one (method: 04F71101) is Zstd

\> 7z.exe i | grep 4F71101
 0  ED   4F71101 ZSTD

and was made with 7-Zip-zstd. One can still decompress it with it or just run it as it's self extracting exe.

Maybe 7-zip should consider adding this method as supported into main line. After all it can decompress zstd archives. It could also decompress is as a codec.