CITMTA & CIT FixCIT Tools

MTA:SA error code

MTA:SA error CD40

The server is older than your client.

Code
CD40
Where you see it
The connection dialog
MTA's own wording
Server build older
Family
CD codes

What it means

Nothing on your side is broken. The server has to update before you can join with a newer client.

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 this code as Server build older.

How to fix it

Work down the list and stop when it is solved.

  1. Copy the whole message first

    Write down every line MTA shows, not only the code. The rest of the message often names the file, the server or the reason, and that is what tells you which step below applies.

  2. Ask the server, not MTA

    If the message names a server rule, a kick, a ban or a reason, that decision belongs to that server. Take the exact message to the server's own forum or Discord. MTA cannot change another server's decision.

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 CD codes

Where this comes from

Official Error Codes catalog; full message and issuer remain necessary.

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