MTA:SA error code

MTA:SA error CC21

The address you asked MTA to connect to is not a valid host.

Code

CC21

Where you see it

A dialog from MTA itself

MTA's own wording

Invalid host

Family

CC codes

What it means

It usually comes from a typed address or an mtasa:// link with a mistake in it. Pick the server in MTA's server browser instead of typing the address.

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 host.

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. 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 own connection

   Open a web page on the same computer. If other things are also failing, fix the connection first. A working website does not prove a game server is reachable, but a broken one explains a lot.

Other CC codes

• CC20MTA refused the nickname you tried to connect with.
• CC22MTA could not open a connection to that server.
• CC23MTA waited for the server and got no answer in time.
• CC24The client and the server did not agree on the encryption or protocol used for the connection.
• CC25The server closed the connection.
• CC26The connection to the server was lost.
• CC27That server has banned you.
• CC28The server disconnected you.
• CC29The connection to the server dropped.
• CC30The server refused the connection.
• CC31MTA could not load the mod it needs for that server.
• CC32The server's answer was not what MTA expected (second form).
• CC33The server's answer was not what MTA expected, and MTA kept the payload it received.
• CC34The networking library on your client and on the server are different versions.
• CC40MTA loaded a module that is not the one it expected.

Every MTA:SA error code · Crash codes and offsets