If the error persists, ensure your system meets the baseline requirements for Lumion to function without crashing during the load routine. Component Minimum Requirement Recommended 6 GB VRAM (GTX 1060 equivalent) 8-12 GB VRAM System RAM Disk Space 30 GB free on C: drive 50 GB+ free on NVMe SSD OS Windows 10/11 64-bit (v2004+) Latest Windows 11

If you are using Lumion 10.0 to 10.3.2 and the steps above don't work, follow these official Lumion support instructions Navigate to the folder in your installation directory (e.g., C:\Program Files\Lumion 10.x\3rd Locate the file onnxruntime.dll it directly into the root folder where Lumion.exe is located. Restart Lumion. Pro Tips for a Smooth Launch Run as Administrator : Right-click the Lumion icon and select Run as Administrator to ensure it has the necessary permissions. Update VC++ Redistributables : If the error persists, repair the Microsoft VC++ redistributables found in the Various\Redist versions folder of your installation directory. Check Disk Space : Ensure you have at least 30 GB of free space on your drive, as Lumion needs room for temporary files. Are you using a dedicated graphics card integrated one for your Lumion renders? How do you resolve start-up problems? - Knowledge Base

Ensure all downloaded parts (e.g., Part 1, Part 2, etc.) are in the same folder .

: To prevent it from happening again, add the Lumion installation folder (usually C:\Program Files\Lumion [version] Antivirus Exclusions list Additional Troubleshooting