Strict outbound rules can block the required ports entirely.
Ensure you aren't on a public Wi-Fi with restrictive blacklisting. Reset Mismatches CTRL + SHIFT
Leftover lines from previous network configurations or older software versions can misdirect Lumion’s server requests. Strict outbound rules can block the required ports entirely
Follow these steps to restore your connection and get back to rendering. 1. Check the Windows 'hosts' File
Overzealous antivirus scanners regularly block files inside Lumion's dynamic subdirectories. Permanent Windows Security Fix Follow these steps to restore your connection and
If connectivity persists as an issue, the software environment may be unstable: How do you resolve antivirus and firewall problems?
: Add the entire Lumion installation folder (usually in C:\Program Files\Lumion 12.0 ) to your antivirus exclusion list. Permanent Windows Security Fix If connectivity persists as
Search for "Allow an app through Windows Firewall" in your Windows search bar. Click Change settings and ensure both are checked for Lumion.exe Check Ports:
, this feature could propose a 24-hour "emergency lease" that activates via a temporary mobile hotspot connection if the main server is unreachable. Immediate Manual Fixes If you need to fix this right now without new features: Run as Administrator : Right-click the shortcut and select Run as administrator Firewall Exclusions : Manually add Lumion.exe to your antivirus and Windows Firewall exclusion lists. Check Your Account : Ensure your Lumion 12 license is registered on the Lumion Account page on how to manually clean your Windows hosts file to unblock the server? News - Notice for Lumion 12 and older version users