Unable to Install AI Assistant: LZMA Codec Not Supported

[Lunix]

Hello everyone,

I am facing an issue while trying to install the AI Assistant extension in Qt Creator. Here are the details of my problem:

Error encountered:

When I try to install AI Assistant via the Extensions interface in Qt Creator, I get the following error:

Running C:\WINDOWS\system32\tar.exe xvf C:/Users/masto/AppData/Local/Temp/QtCreator-NEzDNX/dHfpDr-Asset
in "C:\Users\masto\AppData\Local\Temp\QtCreator-NEzDNX\plugininstall.YCcvgb".

tar.exe: LZMA codec is unsupported
tar.exe: Error exit delayed from previous errors.

Command failed.

It seems that the issue is related to the LZMA codec, which is not supported by the version of tar.exe used by Qt Creator.

How can I resolve this issue to install AI Assistant successfully?
Is there an alternative way to manually install the extension?

Config :

{noformat}
Qt 6.8.1 (x86_64-little_endian-llp64 shared (dynamic) release build; by MSVC 2022) on "windows" 
OS: Windows 10 Version 22H2 [winnt version 10.0.19045]

Architecture: x86_64; features: SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX AVX2 RDRAND RDSEED AES SHA

Plugin information:

+ Android                           15.0.1
+ AutoTest                          15.0.1
  AutotoolsProjectManager           15.0.1
  Axivion                           15.0.1
  BareMetal                         15.0.1
+ Bazaar                            15.0.1
  Beautifier                        15.0.1
+ BinEditor                         15.0.1
  Boot2Qt                           15.0.1
+ CMakeProjectManager               15.0.1
  CVS                               15.0.1
+ ClangCodeModel                    15.0.1
+ ClangFormat                       15.0.1
+ ClangTools                        15.0.1
+ ClassView                         15.0.1
  ClearCase                         15.0.1
  Coco                              15.0.1
+ CodePaster                        15.0.1
  CompilationDatabaseProjectManager 15.0.1
  CompilerExplorer                  15.0.1
  Conan                             15.0.1
  Copilot                           15.0.1
+ Core                              15.0.1
+ CppEditor                         15.0.1
  Cppcheck                          15.0.1
+ CtfVisualizer                     15.0.1
+ Debugger                          15.0.1
+ Designer                          15.0.1
+ DiffEditor                        15.0.1
  Docker                            15.0.1
  EffectComposer                    15.0.1
  EmacsKeys                         15.0.1
+ ExtensionManager                  15.0.1
+ FakeVim                           15.0.1
  Fossil                            15.0.1
+ GLSLEditor                        15.0.1
+ GenericProjectManager             15.0.1
+ Git                               15.0.1
  GitLab                            15.0.1
  Haskell                           15.0.1
  HelloWorld                        15.0.1
+ Help                              15.0.1
+ ImageViewer                       15.0.1
+ IncrediBuild                      15.0.1
  Insight                           15.0.1
  Ios                               15.0.1
+ LanguageClient                    15.0.1
+ Lua                               15.0.1
+ Lua Language Server               1.0.0
  Lua Tests                         1.0.0
+ LuaLanguageClient                 15.0.1
+ Macros                            15.0.1
+ Marketplace                       15.0.1
  McuSupport                        15.0.1
+ Mercurial                         15.0.1
  MesonProjectManager               15.0.1
+ ModelEditor                       15.0.1
  Nim                               15.0.1
+ PerfProfiler                      15.0.1
  Perforce                          15.0.1
+ ProjectExplorer                   15.0.1
+ Python                            15.0.1
+ QbsProjectManager                 15.0.1
+ QmakeProjectManager               15.0.1
  QmlDesigner                       15.0.1
+ QmlDesignerBase                   15.0.1
  QmlDesignerLite                   15.0.1
+ QmlJSEditor                       15.0.1
+ QmlJSTools                        15.0.1
+ QmlPreview                        15.0.1
+ QmlProfiler                       15.0.1
+ QmlProjectManager                 15.0.1
+ Qnx                               15.0.1
+ QtApplicationManagerIntegration   15.0.1
+ QtSupport                         15.0.1
+ RemoteLinux                       15.0.1
+ ResourceEditor                    15.0.1
+ Rust Language Server              1.0.0
  SafeRenderer                      15.0.1
  ScreenRecorder                    15.0.1
+ ScxmlEditor                       15.0.1
  SerialTerminal                    15.0.1
  SilverSearcher                    15.0.1
  Squish                            15.0.1
  StudioWelcome                     15.0.1
+ Subversion                        15.0.1
+ Tell A Joke                       1.0.0
+ Terminal                          15.0.1
+ TextEditor                        15.0.1
  Todo                              15.0.1
+ UpdateInfo                        15.0.1
+ Valgrind                          15.0.1
  Vcpkg                             15.0.1
+ VcsBase                           15.0.1
+ WebAssembly                       15.0.1
+ Welcome                           15.0.1

Used settingspath: ~/AppData/Roaming/QtProject

Product: Qt Creator 15.0.1
Based on: Qt 6.8.1 (MSVC 2022, x86_64)
Built on: Jan 22 2025 13:47:55
From revision: 0855a2e14d

{noformat}

Thanks in advance for your help!

[cristian-adam]

Try out Qt Creator 16.0.0. We changed the order of searching tools on the machine that could unpack a 7z file.

Otherwise do try to install https://www.7-zip.org/ on your machine.

[Lunix]

The update to Qt Creator 16.0.0 and Qt 6.9.0 solved the problem. Thank you !