If you're unsure about which entries are causing the issue, you can reset your host file to its default state. This will remove all custom entries, so use this method with caution.
If you arrived at this article because you installed a cracked version of Lumion 2023, you need to understand the true cost of "free" software.
If managing multiple workstations, ensure group policies or security tools aren’t pushing host file rules that block Lumion’s license servers. Add the following to your allowlist:
Windows (Admin command prompt)
macOS (Terminal)
Linux (systemd-resolved)
Step 1: Open Notepad as Administrator
Step 2: Open the Hosts File
Step 3: Identify and Remove Lumion Entries
127.0.0.1 license.lumion3d.com
0.0.0.0 backup.lumion3d.com
127.0.0.1 localhost line.Step 4: Save the File
Step 5: Flush DNS Cache
Step 6: Restart Lumion 2023 Launch Lumion again. The error should no longer appear, and your licensed copy should activate normally.
If you're unsure about which entries are causing the issue, you can reset your host file to its default state. This will remove all custom entries, so use this method with caution.
If you arrived at this article because you installed a cracked version of Lumion 2023, you need to understand the true cost of "free" software.
If managing multiple workstations, ensure group policies or security tools aren’t pushing host file rules that block Lumion’s license servers. Add the following to your allowlist:
Windows (Admin command prompt)
macOS (Terminal)
Linux (systemd-resolved)
Step 1: Open Notepad as Administrator
Step 2: Open the Hosts File
Step 3: Identify and Remove Lumion Entries
127.0.0.1 license.lumion3d.com
0.0.0.0 backup.lumion3d.com
127.0.0.1 localhost line.Step 4: Save the File
Step 5: Flush DNS Cache
Step 6: Restart Lumion 2023 Launch Lumion again. The error should no longer appear, and your licensed copy should activate normally.