MTA:SA installer code
MTA:SA error U01
The MTA installation did not complete.
- Code
U01- Where you see it
- The MTA installer
- MTA's own wording
- Installation incomplete
- Family
- Installer codes
What it means
U codes come from the MTA installer itself. MTA's own documentation gives this code as Installation incomplete.
How to fix it
Work down the list and stop when it is solved.
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.
Run the installer as administrator
Right click the installer and choose Run as administrator, and allow it through your security software while it runs.
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 U codes
Every MTA:SA error code · Crash codes and offsets
Where this comes from
Meanings read from these sources on 5 September 2026 and written in our own words here.