CITMTA & CIT FixCIT Tools

MTA:SA error code

MTA:SA error CC81

The nickname contains characters MTA does not allow.

Code
CC81
Where you see it
A dialog from MTA itself
MTA's own wording
Invalid nickname characters
Family
CC codes

What it means

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. MTA's own documentation gives this code as Invalid nickname characters.

How to fix it

Work down the list and stop when it is solved.

  1. Change your nickname in MTA

    Open MTA, go to Settings, then Multiplayer, and set a different nickname. Keep it short, use letters and numbers, and avoid spaces and unusual symbols.

  2. Try the connection again

    Close MTA, open it again and connect once more. A single failed attempt can come from a restart on the server or a short break in your own connection.

  3. Check your log if it keeps happening

    Paste the message, or MTA's core.log, into the Fix tool on this site. It runs on your own computer and points at the matching steps.

Still stuck? The Fix tool reads MTA's own log on your computer and points at the matching steps. Nothing is uploaded.

Open the Fix tool

Other CC codes

Where this comes from

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