MTA:SA fix
A GTA:SA file is incorrect or missing (PakFiles.dat)
MTA will not start, and the file path under the message ends with PakFiles.dat, a GTA file that MTA checks. Run a full virus scan first, then install GTA San Andreas again from a trusted source.
MTA:SA cannot launch because a GTA:SA file is incorrect or missing:
Steps
Read the file path under the message
Under the message, MTA shows the path of a file. This fix is for the case where that path ends in audio\CONFIG\PakFiles.dat inside your GTA San Andreas folder.
Source: MTA source code, MTA source code
Make sure an anti-virus is running
If no anti-virus is running on your PC, install one. MTA's help page lists free ones: Bitdefender Antivirus Free, Avast Free Antivirus, AVG AntiVirus Free and Malwarebytes Free.
Source: MTA help
Update it and scan the whole PC
Update your anti-virus and check that real-time scanning is on. Then run a complete virus scan of the computer.
Source: MTA help
Install GTA again from a trusted source
Install GTA San Andreas again, from a copy you bought from a trusted source. MTA's help page links its 'Where to buy GTA:SA' page. If your copy is digital, install the latest MTA after you install the game.
Start MTA again
Start Multi Theft Auto again.
Source: MTA help
See also: GTA executable or a required GTA file is missing, MTA data files or core.dll are missing, Which GTA San Andreas works with MTA (Steam, Rockstar Store, Definitive Edition), MTA:SA cannot launch because patching GTA:SA has failed
MTA's help page for this error is called 'PakFiles.dat Is Incorrect'. Its short description says the game's audio/CONFIG/PakFiles.dat was tampered with (changed).
MTA compares the file's hash (a kind of fingerprint) with one fixed value. If the file has changed, the check fails.
MTA uses the same message for another check, on GTA's eax.dll, ogg.dll, vorbis.dll and vorbisFile.dll. That check opens a different help name (gendep_error), and MTA's help site had no page for it on 23 October 2026. If the path under the message ends with one of those files, this fix is not written for that case.
A similar message says an MTA:SA file (not a GTA:SA file) is incorrect or missing. That is a different check, and MTA sends it to its Data Files Missing page.
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.
Other problems like this
- MTA:SA cannot launch because patching GTA:SA has failed
- CL30: Data file is missing or modified. Possible virus activity
- CL38: Error loading netc.dll module
- CL13: GTA path contains unsupported (unicode) characters
- CL01: MTA:SA could not complete the following task (Administrator access)
- CL33: Main file has an incorrect name
All fix guides · Every MTA:SA error code · Crash codes and offsets
Where this comes from
MTA help site (PakFiles.dat Is Incorrect), MTA wiki and MTA source code
- github.com/multitheftauto/mtasa-blue/blob/master/Client/loader/FileGenerator.cpp
- github.com/multitheftauto/mtasa-blue/blob/master/Client/loader/CInstallManager.cpp
- help.multitheftauto.com/sa/trouble/gengta_pakfiles/
- wiki.multitheftauto.com/wiki/Where_to_buy_GTASA
Read on 23 October 2026 and written in our own words here.