MTA:SA anti-cheat code

MTA:SA anti-cheat code SD#20

The server does not allow an altered gta3.img or gta_int.img.

How to fix it

1. Keep one clean GTA for MTA

   MTA's manual says to install MTA over a GTA San Andreas with no modifications. If you want to keep single-player mods, install the game a second time in another folder and point MTA at the clean one.

   Source: MTA wiki

2. Take plugins out of the GTA folder

   Remove .asi files and any d3d9.dll from the GTA San Andreas folder. MTA's guides list both as things to remove when MTA will not start. Mods such as ENB use a custom d3d9.dll, and a server can also block that file (the anti-cheat guide lists it as SD #12).

   Source: MTA help, MTA help, MTA wiki

3. Changed data files

   By default you cannot join a server with customized GTA data files. If yours are changed, MTA shows a box in Settings, Multiplayer called Use customized GTA:SA files. The guide warns that ticking it keeps you out of most public servers.

   Source: MTA wiki, MTA source code

4. Changed gta3.img

   A server can refuse a non-standard gta3.img or gta_int.img. The anti-cheat guide lists that server option as SD #20.

   Source: MTA wiki

5. Crashes when you connect

   If MTA crashes on connecting to any server while single-player runs fine, the MTA FAQ points at single-player mods and says to use a clean GTA installation.

   Source: MTA wiki

6. On CIT: use /mods

   CIT has its own Modifications window. Type /mods to open it. It has Vehicles, Weapons, Weapon Sounds, Crosshairs and Weapon Skins tabs for the mods CIT offers.

   Source: CIT knowledge base

These are the steps of the guide Using GTA mods with MTA.

Still not fixed? Copy the whole message, not only the code, and check your log in the Fix tool. It is read on your own computer.

About this code

Those archives hold the game's models. Replacing models inside them changes files the server checks.

SD codes are special detections a server can switch on. Most of them are about the environment MTA is running in: a virtual machine, a blocked component, or a program that can change how the game runs. MTA's own documentation gives SD#20 as Altered gta3.img/gta_int.img.

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