MTA:SA error code
MTA:SA error CD50
This MTA serial is already connected to that server.
- Code
CD50- Where you see it
- The connection dialog
- MTA's own wording
- Serial already connected
- Family
- CD codes
What it means
It usually means a second MTA on the same computer, or a session that has not timed out yet.
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 Serial already connected.
How to fix it
Work down the list and stop when it is solved.
Close the other MTA
Make sure no second MTA or GTA is still running, then wait a moment and connect again.
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.
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 toolOther CD codes
- CD01The nickname you connected with is not allowed.
- CD02There is no active connection for MTA to work with.
- CD03The nickname you connected with is not allowed.
- CD04MTA could not find a local server to connect to.
- CD05You were kicked, and the server gave a reason.
- CD06MTA could not connect to a server running on this computer.
- CD07A server running on this computer did not answer in time.
- CD08The connection timed out: the server did not answer in time.
- CD09The connection to the server was lost.
- CD10The client and the server did not agree on encryption or protocol.
- CD11The server closed the connection.
- CD12The connection to the server was lost.
- CD13That server has banned you.
- CD14The server is full.
- CD15The server disconnected you.
Every MTA:SA error code · Crash codes and offsets
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.