Navigate to C:\Windows\System32\drivers\etc\ and open the file named . Search for any lines containing the word "lumion" . Delete these lines and save the file. Note: Ensure you do not save it with a .txt extension. 5. Troubleshooting Startup & System Software
If you are still seeing the error, go through this checklist:
If you are working remotely or using a Virtual Private Network (VPN), the secure tunnel may filter out the specific ports Lumion uses. Note: Ensure you do not save it with a
DNS (Domain Name System) issues can prevent your computer from properly resolving Lumion's server addresses to IP addresses, causing connection failures.
By systematically moving through these steps, you will eliminate the digital roadblocks preventing Lumion 12 from reaching its destination, allowing you to validate your license and get back to creating beautiful architectural visualizations. To help narrow this down further, let me know: DNS (Domain Name System) issues can prevent your
Register your license in your Lumion Account immediately, regardless of whether you currently experience issues. This is especially critical for Lumion 12 and earlier versions.
Your firewall might be overprotective, blocking Lumion 12 from broadcasting outbound data. You need to create an explicit rule allowing it through. Allowing Lumion through Windows Firewall: Note: Ensure you do not save it with a
The error "Lumion 12 is being prevented from contacting the license server"
If you previously clicked "Block" in a pop-up dialog, you must delete the existing "Block" rule for Lumion before creating the Allow rule.
If you have tried all of these steps and the error still persists, reach out to the official Lumion Support team with your license details, as there may be an administrative hold or a glitch tied directly to your specific activation key.