Lumion 12 Is Being Prevented From Contacting The License Server 2021 Guide

The Frustrating Experience

Troubleshooting Guide: "Lumion 12 is Being Prevented from Contacting the License Server"

Q: Does Lumion 12 require constant internet?

A: No. Lumion 12 checks the license server at startup and every ~60 minutes. You can lose internet after launch, but you will get the error if you restart the software offline.

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The most common cause of this specific error is an entry in your Windows hosts file that explicitly blocks Lumion's domains. Search for in the Windows search bar. Right-click it and select Run as Administrator . You can lose internet after launch, but you

"Lumion 12 is being prevented from contacting the license server"

Troubleshooting: Lumion 12 Connection to License Server Seeing the error message can bring your project to a grinding halt. This usually happens because your computer’s security settings or network configuration are blocking Lumion's communication with the Lumion authorization servers . Right-click it and select Run as Administrator