CITMTA & CIT FixCIT Tools

MTA:SA launcher code

MTA:SA error CL23

core.dll, one of MTA's own files, is missing.

Code
CL23
Where you see it
The MTA launcher, before the game opens
MTA's own wording
core.dll absent
Family
CL codes

What it means

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 this code as core.dll absent.

How to fix it

Work down the list and stop when it is solved.

Longer version, with a source on every step: MTA data files or core.dll are missing.

  1. Repair your MTA installation

    Run the current installer from multitheftauto.com over your existing installation. It replaces MTA's own files without touching your settings.

  2. 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.

  3. Use a clean GTA: San Andreas

    MTA needs an unmodified GTA installation. If mods, an ASI loader or a replaced gta_sa.exe are in the game folder, reinstall GTA into a fresh folder and let MTA use that copy.

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 CL codes

Where this comes from

Official Error Codes catalog; historical entries retained and installed-release applicability unverified.

Meanings read from these sources on 5 September 2026 and written in our own words here.