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MTA:SA error code

MTA:SA error CC34

The networking library on your client and on the server are different versions.

How to fix it

  1. Close MTA completely

    Close the game before you update MTA’s files.

    Source: MTA help

  2. Install the current official release

    Get the current MTA installer from its official site and finish the installation. The official guide for this error says a newer MTA may fix it.

    Source: MTA help, MTA download

  3. Connect again, then compare with another server

    Connect again. If the error is still there, try another server you trust to compare. Then report the exact protocol message and the MTA build you have installed. Do not change your account password or your serial to try to fix a protocol mismatch.

    Source: MTA help, MTA forum

These are the steps of the guide Disconnected by an unknown protocol error.

Still not fixed? Copy the whole message, not only the code, and check your log in the Fix tool. It is read on your own computer.

About this code

This is the usual sign of an out-of-date client, or of a server running a different MTA branch.

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 CC34 as RakNet protocol mismatch.

Where this comes from

Read on 5 September 2026 and written in our own words here.