How to Fix Unknown Error 0 in Arma Reforger (Cannot Download Mods) – EASY FIX 2026
Command : ArmaReforgerSteam.exe -addonDownloadDir
Hey guys!
If you can’t download mods and keep getting the Unknown Error 0, this video will help you fix it quickly.
I had the same problem — mods wouldn’t download at all, even after restarting the game.
The issue was that the game was trying to download mods into the wrong folder (Documents).
In this video, I show you how to fix it by redirecting the download folder using a simple command.
💡 Command:
ArmaReforgerSteam.exe -addonDownloadDir "YOUR PATH HERE"
📂 Steps:
Open Steam
Go to Properties
Click "Browse Local Files"
Open the addons folder
Copy the folder path
Paste it into the command
After that, mods should start downloading normally.
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