Arma 3 Server Mods Not Loading? How to Fix modlist.html Errors

If Arma 3 server mods are not loading, read the Console after a restart. The warning Arma 3 Modlist file "modlist.html" could not be found, or is invalid! means the uploaded file’s name doesn’t match the Modlist File variable or wasn’t exported from the Arma 3 Launcher. For uploaded mods, use lowercase folder names in Additional Mods and try [Repair] Make Mod Files Lowercase once.

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Check the startup line first

After a restart, the console prints the full parameter line. Look at -mod= and -serverMod=. If a mod is missing there, the panel didn’t add it: check the variables below. If the mod is listed but doesn’t work in game, check the folder and its keys.

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Fixes for Arma 3 mods not loading

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How to check a Workshop mod by ID

Workshop mods from modlist.html are stored in folders named @ plus the Workshop ID, for example @450814997 for CBA_A3. To add a single Workshop mod without the modlist, put that form in Additional Mods, for example @450814997;. With Automatic Updates on, the server downloads and updates it.

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When to restore or reinstall

If nothing helps, restore a backup from before you added the mods. Share the console log with our team in a ticket if you need help.

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Frequently asked questions

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Can I ignore the modlist.html warning on a vanilla server?

Yes. Without a modlist the server starts with no Workshop mods. Clear Modlist File if you don’t want the warning.

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Why do mods from my Windows PC not load?

Windows ignores capital letters in file names, Linux doesn’t. Use [Repair] Make Mod Files Lowercase for one start after uploading.

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Do I need to restart after changing mods?

Yes. Mods are only loaded when the server starts.

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Related guides

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