MTA:SA error code

MTA:SA error CD01

The nickname you connected with is not allowed.

How to fix it

1. Change the nickname in MTA's settings

   Press ESC, open Settings, then the Multiplayer tab. Type a new name in the Nick box and press OK, then connect again. If MTA says Your nickname contains invalid characters!, it did not accept the new name: use the next step.

   Source: MTA source code, MTA wiki, CIT Live KB · mta_settings.md, settings.md

2. Use only allowed characters

   Only if MTA says the nickname is invalid or has invalid characters.

   Use 1 to 22 characters and no spaces. MTA accepts only visible characters with the codes 33 to 126: English letters (A to Z), numbers (0 to 9) and simple symbols such as _ - [ ] ( ). Letters with accents (like é) and letters from other alphabets (like Arabic or Russian letters) are not accepted.

   Source: MTA source code, MTA source code, Microsoft

3. Connecting failed: no ` sign, and not admin, console or server

   Only if you see: Connecting failed. Invalid nick provided!

   MTA refuses a nickname with the ` sign (backtick) in it. It also refuses the nicknames admin, console and server, in capital or small letters. Choose another name.

   Source: MTA source code

4. Nick already in use: pick another name

   Only if the message is Disconnected: Nick already in use.

   The nickname you joined with is already in use. Set a different one in ESC > Settings > Multiplayer > Nick. Then open the console with F8 (or the ~ key), type reconnect and press Enter. It connects you to the server you were on before.

   Source: MTA wiki, MTA wiki, MTA wiki, CIT Live KB · account_support.md

5. Or change it while you play

   Only if you are already on a server.

   Open the console with F8 and type nick, then the new name. On CIT you can also type /nick and the new name. CIT blocks nicknames with repeating characters (the same letter again and again), so choose a different one.

   Source: MTA wiki, CIT Live KB · commands-account-and-general.md

These are the steps of the guide Invalid nickname or Nick already in use.

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 CD01 as Invalid nickname.

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