Sometimes the error stems from missing or corrupted legacy DirectX components, even if the wrapper is in place.

Sometimes the error is triggered because the game is trying to launch at a resolution your monitor doesn’t support. Go to the Config folder in your game directory. Open Video.cfg with Notepad.

Some users find success by creating a MiscData2.cfg in the Config folder to bypass initial mission locks or display issues.

Download the (available on Settlers community fansites).

Paste those files ( D3D8.dll , D3D9.dll , etc.) directly into the game's Bin folder. Run dgVoodooCpl.exe from that folder.

Navigate to your game installation folder (usually under C:\Program Files (x86)\BlueByte\Settlers IV\Bin ). Right-click and select Properties . Go to the Compatibility tab.