CITMTA & CIT FixCIT Tools

MTA:SA fix

Another MTA or GTA instance is already running

A still-running game process can prevent the next launch.

The message

Another instance of MTA is already running

Codes on this page: CL05, CL06, CL10, CL11

Steps

Try one step, then check whether the problem is still there. Follow any "only if" line before changing a setting.

  1. Exit the existing game normally

    Check the taskbar for an open MTA or GTA window and close it. Wait until it finishes closing before launching again.

  2. Close only a stuck game process

    Only if the game did not finish closing.

    Only if its window is gone but the process remains, open Task Manager and end the identified MTA or GTA process. Do not end unrelated Windows processes.

    Careful: Ending a game process discards its unsaved session.

  3. Restart if the process will not close

    Save your other work and restart Windows. Then start one MTA instance from the installed launcher.

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

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Where this comes from

Official MTA guidance · reviewed 7 September 2026

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