MTA: San Andreas

MTA:SA error codes, and what each one means

MTA shows a short code with most of its errors. This is every code MTA publishes, in plain words, with the steps that actually help. Nothing here is a guess: each page says where its meaning comes from, and says so plainly when the meaning is not published.

Crash codes and offsets · Script and resource numbers · The Fix tool

CD codes46

A CD code appears when a connection to a server fails, is refused, or ends. Most of them carry a second line with the server's own reason.

Code	What it means
`CD01`	The nickname you connected with is not allowed.
`CD02`	There is no active connection for MTA to work with.
`CD03`	The nickname you connected with is not allowed.
`CD04`	MTA could not find a local server to connect to.
`CD05`	You were kicked, and the server gave a reason.
`CD06`	MTA could not connect to a server running on this computer.
`CD07`	A server running on this computer did not answer in time.
`CD08`	The connection timed out: the server did not answer in time.
`CD09`	The connection to the server was lost.
`CD10`	The client and the server did not agree on encryption or protocol.
`CD11`	The server closed the connection.
`CD12`	The connection to the server was lost.
`CD13`	That server has banned you.
`CD14`	The server is full.
`CD15`	The server disconnected you.
`CD16`	The connection to the server was lost.
`CD17`	The password you gave for that server is wrong.
`CD18`	The server refused the connection.
`CD19`	The client verification step did not complete.
`CD20`	A file the server sends you could not be downloaded.
`CD30`	The server rejected the nickname.
`CD31`	A general disconnect: the connection ended without a more specific reason.
`CD32`	The server banned the serial of this MTA installation, and gave a reason.
`CD33`	The server banned you, and gave a reason.
`CD34`	The server banned the account you logged in with, and gave a reason.
`CD35`	Your MTA version does not match what the server accepts.
`CD36`	The server saw too many join attempts in a row and refused this one.
`CD37`	The server runs a different MTA branch than your client.
`CD38`	The server does not accept your version, and the message says which version it wants.
`CD39`	The server is newer than your client.
`CD40`	The server is older than your client.
`CD41`	Somebody on that server is already using your nickname.
`CD42`	The server could not create your player in the game.
`CD43`	The server refused the connection and gave its own reason.
`CD44`	The serial check of your MTA installation did not pass.
`CD45`	The client and the server fell out of step, and the message carries the details.
`CD46`	Somebody on the server kicked you, and the message names them and the reason.
`CD47`	Somebody on the server banned you, and the message names them and the reason.
`CD48`	The server ended the connection with its own text.
`CD49`	The server is restarting or shutting down.
`CD50`	This MTA serial is already connected to that server.
`CD60`	A server started on this computer failed to start.
`CD61`	An internal label MTA uses for a disconnect. On its own it does not describe a cause.
`CD62`	The client hit a fatal error and closed the connection.
`CD63`	A protocol or connection error ended the session.
`CD64`	This MTA version has expired and the server will not accept it.

CC codes31

MTA's own client shows a CC code when something fails before or during a connection: the address, the nickname, a module it could not load, or the connection itself.

Code	What it means
`CC20`	MTA refused the nickname you tried to connect with.
`CC21`	The address you asked MTA to connect to is not a valid host.
`CC22`	MTA could not open a connection to that server.
`CC23`	MTA waited for the server and got no answer in time.
`CC24`	The client and the server did not agree on the encryption or protocol used for the connection.
`CC25`	The server closed the connection.
`CC26`	The connection to the server was lost.
`CC27`	That server has banned you.
`CC28`	The server disconnected you.
`CC29`	The connection to the server dropped.
`CC30`	The server refused the connection.
`CC31`	MTA could not load the mod it needs for that server.
`CC32`	The server's answer was not what MTA expected (second form).
`CC33`	The server's answer was not what MTA expected, and MTA kept the payload it received.
`CC34`	The networking library on your client and on the server are different versions.
`CC40`	MTA loaded a module that is not the one it expected.
`CC41`	MTA could not act on the address it was given.
`CC42`	MTA could not start with the mod given on the command line.
`CC43`	MTA stopped because the drive is out of space.
`CC50`	MTA could not start Direct3D 9, the graphics layer GTA uses.
`CC51`	MTA could not load its interface skin.
`CC70`	No address was given, so MTA had nothing to connect to.
`CC71`	The link used the wrong protocol. MTA links start with mtasa://.
`CC72`	The nickname is not valid.
`CC73`	The nickname is not valid.
`CC74`	MTA needs a server to be selected before it can connect.
`CC75`	No address was given, so MTA had nothing to connect to.
`CC80`	MTA needs to leave the server before it can change the skin of its interface.
`CC81`	The nickname contains characters MTA does not allow.
`CC82`	MTA needs to leave the server before it can change its language.
`CC99`	MTA is waiting to finish a language change.

CL codes41

CL codes come from MTA's launcher, before the game starts: installing an update, finding GTA, loading MTA's own files or starting gta_sa.exe.

Code	What it means
`CL01`	An installation step failed while MTA was setting itself up.
`CL02`	MTA could not copy its update files into place.
`CL03`	The installation is incomplete.
`CL04`	MTA could not restart itself to finish what it was doing.
`CL05`	MTA is already running.
`CL06`	MTA is asking whether it may close the copy that is already running.
`CL07`	MTA is offering to roll back to its previous state.
`CL08`	MTA is offering to reset GTA's settings.
`CL09`	MTA could not delete a file it wanted to replace.
`CL10`	GTA is already running.
`CL11`	MTA could not close the GTA that is already running.
`CL12`	MTA cannot find GTA's registry entries, so it does not know where the game is.
`CL13`	The installation path contains characters MTA cannot work with.
`CL14`	This is an old Steam version of GTA that MTA cannot use.
`CL15`	There is a semicolon in the path to GTA or MTA, and the game cannot handle it.
`CL16`	MTA's own data files are missing.
`CL17`	MTA's own data files are missing.
`CL18`	A client module MTA needs is not there.
`CL20`	gta_sa.exe is not in the folder MTA is pointed at.
`CL21`	A file in the GTA folder is in MTA's way.
`CL22`	MTA could not start gta_sa.exe.
`CL23`	core.dll, one of MTA's own files, is missing.
`CL24`	core.dll or a Windows runtime it needs could not load.
`CL25`	MTA is asking to start or close GTA.
`CL26`	core.dll or a Windows runtime it needs could not load.
`CL28`	MTA noticed ASI plugin files in the game folder and is warning about them.
`CL29`	MTA says its own files do not look right at launch.
`CL30`	A file MTA checks is missing or has been changed.
`CL31`	A GTA file could not be opened.
`CL33`	The launcher is not running under the filename MTA expects.
`CL34`	GTA could not load a model.
`CL35`	GTA could not add a vehicle upgrade part.
`CL36`	A file GTA needs is not there.
`CL37`	MTA's documentation does not publish a meaning for this code.
`CL38`	A module could not be loaded.
`CL39`	MTA points at its page about programs that conflict with it.
`CL40`	The versions of MTA's files do not match each other.
`CL41`	A file MTA needs is missing.
`CL42`	Windows is in Safe Mode, and MTA cannot run there.
`CL43`	An old label that MTA used for a menu and for the Evolve program.
`CL44`	GTA's IMG archive is damaged.

AC codes7

AC is one of MTA's three anti-cheat prefixes. The number names a published detection category. MTA's own guide says a detection does not prove intent, and it does not list every detector.

Code	What it means
`AC#1`	MTA's anti-cheat lists this number under health or armour manipulation.
`AC#2`	MTA's anti-cheat lists this number under DLL corruption.
`AC#4`	MTA's anti-cheat lists this number as a broad security detection.
`AC#5`	MTA's anti-cheat lists this number under trainers.
`AC#11`	MTA's anti-cheat lists this number under additional trainers.
`AC#18`	MTA's anti-cheat lists this number under altered game files.
`AC#21`	MTA's anti-cheat lists this number under additional trainers.

SD codes16

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.

Code	What it means
`SD#12`	The server does not allow a custom d3d9.dll in the game folder.
`SD#13`	A special detection listed under data integrity.
`SD#14`	The server does not allow playing from a virtual machine.
`SD#15`	The server does not allow the driver signing state your Windows is in.
`SD#16`	MTA's anti-cheat could not start.
`SD#20`	The server does not allow an altered gta3.img or gta_int.img.
`SD#22`	A script the server sent you arrived damaged.
`SD#23`	A file the server sent you arrived damaged.
`SD#26`	Something is blocking a part of MTA's anti-cheat.
`SD#28`	The server does not allow playing through Wine.
`SD#31`	MTA ignored keyboard input that was sent by software rather than typed.
`SD#32`	MTA ignored mouse input that was sent by software rather than moved.
`SD#33`	The server does not allow a network limiter to be running.
`SD#34`	The server has an internet café restriction, and your connection was classified that way.
`SD#35`	The server does not allow a program that can lock the frame rate, such as certain screen recorders.
`SD#36`	The server does not allow AutoHotkey or a similar automation binary to be running.

VF codes6

VF is a second anti-cheat prefix, used for verification failures such as changed game files or a trainer. The number names a published category, nothing more.

Code	What it means
`VF#6`	A verification failure listed under trainers that change movement, combat, money, speed or aim.
`VF#7`	A verification failure listed under trainers.
`VF#8`	A verification failure listed under modifications that are not approved.
`VF#11`	A verification failure listed under DLL injection and trainers.
`VF#17`	A verification failure listed under speed or wall manipulation.
`VF#21`	A verification failure listed under a changed gta_sa.exe.

Installer codes1

U codes come from the MTA installer itself.

Code	What it means
`U01`	The MTA installation did not complete.

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Where this comes from

Meanings read from these sources on 5 September 2026 and written in our own words here.