MTA:SA launcher code
MTA:SA error CL40
The versions of MTA's files do not match each other.
How to fix it
Close every running MTA
Close the launcher and the game before you replace MTA’s files.
Source: MTA help
Install one complete official release
Run the current official MTA installer for the installation you use. Do not mix netc.dll or other modules from old downloads with a newer MTA.
Source: MTA help, MTA help, MTA download
Start MTA from the updated copy
Check that your shortcut opens the installation you updated, then try again from it. If it still reports a mismatch, put the complete module name and the versions shown in your support request.
These are the steps of the guide MTA file version mismatch or incompatible network module.
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
It usually follows a partial update, or files copied in from another installation.
CL codes come from MTA's launcher, before the game starts: installing an update, finding GTA, loading MTA's own files or starting gta_sa.exe. MTA's own documentation gives CL40 as File-version mismatch.
All fix guides · Every MTA:SA error code · Crash codes and offsets
Where this comes from
- github.com/multitheftauto/mtasa-blue/blob/489c5d1c7631de313f9ef7a53d455fc5ab20ea4f/Client/loader
- help.multitheftauto.com/sa/trouble/bad-file-version/
- help.multitheftauto.com/sa/trouble/netc-not-compatible/
- multitheftauto.com/
Read on 5 September 2026 and written in our own words here.