CITMTA & CIT FixCIT Tools

MTA:SA error code

MTA:SA error CC24

The client and the server did not agree on the encryption or protocol used for the connection.

Code
CC24
Where you see it
A dialog from MTA itself
MTA's own wording
Encryption/protocol mismatch
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 Encryption/protocol mismatch.

How to fix it

Work down the list and stop when it is solved.

Longer version, with a source on every step: Disconnected by an unknown protocol error.

  1. Install the current MTA update

    Close MTA and run the current installer from multitheftauto.com. Several connection codes are simply an old client meeting a newer server.

  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. 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.

  4. 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.