If you are still experiencing issues, consider checking the Lumion Support Knowledge Base for version-specific patch notes. How do you resolve start-up problems? - Knowledge Base
Did this error start happening (like a Windows update, an antivirus scan, or installing a plugin)?
Navigate to your Lumion installation folder and look for the subfolder. Run the VC_redist.x64.exe file. If you are still experiencing issues, consider checking
Add a folder exclusion for the entire directory: C:\Program Files\Lumion [Your Version] .
: Running Lumion or its installer without administrator rights can prevent it from accessing or writing necessary "channel" configuration data. Step-by-Step Troubleshooting Guide Navigate to your Lumion installation folder and look
The error is rarely a sign of a broken project; it is almost always a pathway issue . By updating the plugin and ensuring the software has administrative rights, you can usually restore the link in minutes.
If you recently upgraded Lumion, downgraded it, or moved it to a different drive, leftover registry entries from previous versions can confuse the software's loading path. : Running Lumion or its installer without administrator
Overzealous security tools frequently flag legitimate .dll and .cgr routine files as threats, deleting or blocking them silently during installation or launch.
: Windows Security or third-party antivirus may block or move files like onnxruntime.dll to quarantine.
: Lumion relies on structural C++ runtimes to bridge communication between data channels. Missing or damaged Microsoft Visual C++ components block these links entirely.
Add Exclusion to Windows Security for C:\Program Files\Lumion [version] . Restore blocked files from Virus Protection History. Repair VC_redist.x64.exe in .../Various/Redist versions . Restart computer.