Lumion 12 Is Being Prevented From Contacting The License Server

Here is a quick guide to getting back to your workflow, ranging from simple account updates to deeper technical fixes. 1. The Critical Update: Register Your Lumion Account

Restart Lumion after registration to refresh the connection. 2. Clean the Windows 'hosts' File

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. Here is a quick guide to getting back

The error "Lumion 12 is being prevented from contacting the license server" is rarely a true internet failure. It is a between your security software and Lumion’s authentication servers.

Scroll down to and click Add or remove exclusions . Click Add an exclusion and choose Folder . The error "Lumion 12 is being prevented from

: If Lumion isn't listed, click Allow another app... , browse to your Lumion installation folder (usually C:\Program Files\Lumion 12.0\Lumion.exe ), add it, and check the network boxes. Click OK to apply. 3. Whitelist Lumion in Third-Party Antivirus

He wasn't running a VPN, but the network’s new security suite was acting like one, masking the local IP in a way the license server viewed as suspicious. It was a digital Catch-22. The security was too strong for the license to get out. If Lumion works

Pro tip: Temporarily disable the antivirus completely for 5 minutes. If Lumion works, you know the AV is the problem. Permanently add Lumion to the exclusions list.

Ensure you have at least 30 GB of free space on your C: drive, as a lack of "swap space" can sometimes trigger startup and connection errors. Summary Checklist Potential Cause Account Sync Register your key at Lumion.com. Security Block Add Lumion.exe to Firewall/Antivirus exclusions. Hosts File