Lumion 12 Is Being Prevented From Contacting The License Server

the file (ensure it does not have a .txt extension) and restart Lumion. 3. Configure Antivirus and Firewall Exclusions

DNS (Domain Name System) issues can prevent your computer from properly resolving Lumion's server addresses to IP addresses, causing connection failures.

Your router or Internet Service Provider (ISP) failing to resolve Lumion’s specific authentication domains. the file (ensure it does not have a

Look for any lines containing the word lumion (for example: 127.0.0.1 backup.lumion3d.net or 127.0.0.1 license.lumiontech.net ). any lines that mention Lumion. Save the file ( Ctrl + S ) and restart Lumion. 2. Whitelist Lumion in Windows Defender Firewall

Type the following commands one by one, pressing Enter after each: Your router or Internet Service Provider (ISP) failing

: Close the command prompt and restart your PC to clear all network caches completely. 5. Disable Proxy Servers and VPNs

When Lumion 12 is prevented from contacting the license server, it typically stems from security software blocking communication or local configuration files misdirecting the connection . 1. Account Registration & Server Infrastructure Save the file ( Ctrl + S ) and restart Lumion

Right-click the Lumion 12 shortcut > Run as administrator . This gives Lumion the privileges to bypass user-level restrictions.

Lumion 12 requires periodic communication with Act-3D’s license servers to verify your subscription or perpetual license. When something blocks that communication, Lumion assumes it cannot validate your license and shows this warning.