MTA:SA error code

MTA:SA error CD44

The serial check of your MTA installation did not pass.

How to fix it

1. Install the current MTA

   The MTA FAQ says an "Invalid serial number" error means your MTA is out of date. Download the latest version from the official site and install it.

   Source: MTA wiki, MTA download

2. Windows inside a virtual machine

   Only if you run MTA inside a virtual machine.

   Install and run MTA once on the real computer, outside any virtual machine. Then try MTA inside the virtual machine again.

   Source: MTA help

3. Linux or Steam Deck

   Only on Linux or a Steam Deck.

   Install and run MTA's Linux server once on the machine itself, as root and outside Wine or any virtual machine. Then start the MTA client again. On a computer with only NVMe drives, the Linux manual adds that a SATA or USB drive must be connected while you do this.

   Source: MTA help, MTA wiki, MTA wiki

4. Mac

   Only on a Mac.

   Download and run the small tool that MTA's serial validation page links, on the Mac itself. If macOS refuses to open it, allow it under Security & Privacy with Open Anyway. Then try MTA again.

   Source: MTA help

5. Cloud gaming or a rented cloud PC

   Only if you play through a cloud gaming or cloud PC service.

   In December 2020 the MTA team announced that serial verification also covers cloud gaming platforms and cloud virtual machines. The fix needs access to the real machine that hosts the virtual one. Those services do not give you that, so MTA says most cloud gaming users can no longer play. If you control the host machine yourself, the virtual machine step above still works.

   Source: MTA forum

6. If you ran a serial changer or spoofer

   Only if such software was ever run on this computer.

   MTA's page says this problem on Windows can be caused by serial changing or hardware spoofing software. MTA does not help undo that and advises reinstalling Windows completely, because such software may also have put malware on the computer.

   Careful: Programs that promise to change your serial come from unknown sources. MTA warns that the computer may be watched or part of a botnet afterwards.

   Source: MTA help

These are the steps of the guide There was a problem validating your serial.

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

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. MTA's own documentation gives CD44 as Serial verification failed.

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