Add the Ran Online executable to the 3D settings and set it to use the "High-performance processor".
: Check "Run this program as an administrator" in the same menu to ensure it has proper file access. 3. Repair Graphics & System Drivers
A common cause for the D3D9 error is the game trying to launch in a resolution that your monitor or GPU doesn't support. Open the Ran Online installation folder. Look for a file named or Option.exe . how to fix d3d9 application error ran online
Download the latest driver package for your graphics card (NVIDIA, AMD, or Intel).
Manually set the resolution to match your desktop (e.g., 1920x1080). Add the Ran Online executable to the 3D
Even if you have a newer version like DirectX 12, legacy games like Ran Online require specific files from DirectX 9. Download the DirectX End-User Runtime Web Installer from the official Microsoft site
Alternatively, within your Steam library (if you play through Steam) or other launchers, you can add the same -force-d3d9 command to the game's launch options. Repair Graphics & System Drivers A common cause
As a more precise alternative, if you use (often installed with MSI Afterburner), you can try this: In RTSS, go to the Global profile. Try setting Detection level to Low and enabling Custom Direct3D support .
In the same Compatibility tab, check "Run this program as an administrator". Windowed Mode:
: If you are playing a specific version like Ran Online GS, check the Official Ran Online GS Facebook page
Since RAN Online is an older game, it relies on legacy DirectX 9.0c files that are not included by default in modern Windows versions.