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Ensure that Port 80 (HTTP) and Port 443 (HTTPS) are open, as these are required for license validation. 🌐 Step 3: Network and Proxy Settings
Look for any lines containing lumion or backup.lumiontech.net . those lines entirely. Save the file and restart Lumion. 🛡️ Step 2: Configure Windows Firewall
Open Command Prompt as Admin and type ipconfig /flushdns , then hit Enter. This clears old connection data. Ensure that Port 80 (HTTP) and Port 443
Open your Firewall settings and ensure Lumion.exe is allowed for both Inbound and Outbound rules.
If you use Norton, McAfee, or Bitdefender, you must manually add the Lumion installation folder to the "White List" or "Exclusions" list. Save the file and restart Lumion
The most frequent cause is an entry in the Windows Hosts file that explicitly blocks Lumion’s web address. Open the and type Notepad . Right-click Notepad and select Run as Administrator . In Notepad, go to File > Open . Navigate to: C:\Windows\System32\drivers\etc
Troubleshoot issues that often follow license errors. Which of these troubleshooting steps Open your Firewall settings and ensure Lumion
This error occurs when the software cannot verify your subscription or license key with Lumion’s official servers. It is a common hurdle for users after an update, a change in network security, or a migration to a new workstation. 🛠️ Step 1: Check the Windows Hosts File
If you are using a VPN, disconnect it and try launching the software again.
Sometimes your security software identifies the license check as suspicious activity and kills the connection.
Ensure that Port 80 (HTTP) and Port 443 (HTTPS) are open, as these are required for license validation. 🌐 Step 3: Network and Proxy Settings
Look for any lines containing lumion or backup.lumiontech.net . those lines entirely. Save the file and restart Lumion. 🛡️ Step 2: Configure Windows Firewall
Open Command Prompt as Admin and type ipconfig /flushdns , then hit Enter. This clears old connection data.
Open your Firewall settings and ensure Lumion.exe is allowed for both Inbound and Outbound rules.
If you use Norton, McAfee, or Bitdefender, you must manually add the Lumion installation folder to the "White List" or "Exclusions" list.
The most frequent cause is an entry in the Windows Hosts file that explicitly blocks Lumion’s web address. Open the and type Notepad . Right-click Notepad and select Run as Administrator . In Notepad, go to File > Open . Navigate to: C:\Windows\System32\drivers\etc
Troubleshoot issues that often follow license errors. Which of these troubleshooting steps
This error occurs when the software cannot verify your subscription or license key with Lumion’s official servers. It is a common hurdle for users after an update, a change in network security, or a migration to a new workstation. 🛠️ Step 1: Check the Windows Hosts File
If you are using a VPN, disconnect it and try launching the software again.
Sometimes your security software identifies the license check as suspicious activity and kills the connection.