Cannot launch Arma III, Proton issue

[TildeEthDoUsPart]

Whenever I try to launch ArmA III, I get an error with Proton:

Direct launch failed, exception: cannor find entry for 'Proton-6.15-GE-2' compatibility tool

I use Debian 10 and the AppImage launcher. Any idea of what could be wrong?

[zupatisc]

Seems like it's expecting to find this custom proton version installed.

[kalrach]

Having a similar issue, ran the program in the terminal and tried Proton 6.3, Proton GE Custom, and Proton Experimental. Only having success launching with Proton Experimental enabled in the compatibility options on Steam. Output and screenshot below.

conf file: "/home/kalrach/.config/a3unixlauncher/launcher.conf" [S_API] SteamAPI_Init(): Loaded '/home/kalrach/.local/share/Steam/linux64/steamclient.so' OK. Setting breakpad minidump AppID = 107410 SteamInternal_SetMinidumpSteamID: Caching Steam ID: 76561198103788868 [API loaded no] Direct launch failed, exception: cannot find tool with appid '1580130', name 'proton_63'. Is it installed in Steam? Direct launch failed, exception: Directory not found: /home/kalrach/.local/share/Steam/compatibilitytools.d/proton-ge-custom Running Arma: env SteamGameId=107410 LD_PRELOAD=/home/kalrach/.local/share/Steam/ubuntu12_64/gameoverlayrenderer.so STEAM_COMPAT_DATA_PATH="/home/kalrach/Games/SteamLibrary/steamapps/compatdata/107410" "/home/kalrach/.local/share/Steam/steamapps/common/Proton - Experimental/proton" run "/home/kalrach/Games/SteamLibrary/steamapps/common/Arma 3/arma3_x64.exe" -skipIntro -world=empty

All output afterwards is just general stuff loading into the game.

[muttleyxd]

I refactored how compatibility tools are found, so this issue was possibly fixed. Please test this release https://github.com/muttleyxd/arma3-unix-launcher/releases/tag/commit-303