Why Assetto Corsa is Obsolete: Why v1.16.3 (and Beyond) is Required
Because the Custom Shaders Patch was specifically coded to look for v1.16.3, it sees v1.16.4 and assumes your game is "obsolete" or unrecognized, even though you technically have a How to Fix the "Obsolete" Error
The error happens when there is a communication breakdown between your game files, your custom launcher, and the multiplayer server. It rarely means your game is actually outdated. Instead, it usually points to a configuration issue within your mods. Common Causes
You have CSP installed, but it is the wrong preview version. For example: You are running CSP 0.2.4-preview, but the server requires CSP 0.1.80 (which reports as 1.16.3). Because the shader patch alters network packets, a mismatch causes a de-sync, flagged as an "obsolete client."
The server requires a specific CSP version that your client is missing. assetto corsa is obsolete v1.16.3 is required
Occasionally, Kunos Simulazioni (the developers) releases tiny, unannounced updates—such as one for a Ferrari esports event—which bumps the internal version number to The Error:
Navigate to your Assetto Corsa root folder (usually SteamLibrary\steamapps\common\assettocorsa ). Locate and open .
Open it and scroll to the very top. If it says 1.16.2 or any other number, manually change it to . Save the file and restart Content Manager. 2. Replace or Repair the acs.pdb File
Find the very first version number listed at the top. If it says 1.16.4 , change it back to and save the file. Why Assetto Corsa is Obsolete: Why v1
To continue using Assetto Corsa with most modern online servers, mods, and Content Manager features, version 1.16.3 is now the mandatory minimum. Any release prior to this—including popular earlier builds—is considered obsolete and incompatible with current community-driven content.
If you own a legitimate copy of Assetto Corsa on Steam, your game should be v1.16.3. If it isn't, the files are corrupt.
Right-click your and select Properties . Go to the Compatibility tab. Look at the Run this program as an administrator checkbox.
The fastest fix lies within Content Manager's developer settings. This forces CM to send the correct version data to the multiplayer server. Open . Common Causes You have CSP installed, but it
The server requires a newer version of the Custom Shaders Patch than you have installed.
The final, simplest approach is often to do nothing. The error message itself does not always prevent the game from functioning correctly. In many cases, players can simply click through the warning and continue with their session. Additionally, CSP developers typically release updates to incorporate new version numbers, ensuring that the patch is updated to understand future releases. As one community member noted, the error did not appear to cause any functional issues in their testing.
Resolving the "Assetto Corsa is Obsolete: v1.16.3 is Required" Error: A Complete Guide