How To Fix D3d9 Application Error — Ran Online ~upd~

Download the from the Microsoft Download Center .

Sometimes the error is triggered by modern display optimizations that conflict with the game's engine. Disable Fullscreen Optimizations: Right-click the Ran Online executable ( RanOnline.exe or the launcher), select Properties Compatibility , and check "Disable fullscreen optimizations". Run as Administrator: how to fix d3d9 application error ran online