Lumion is heavily GPU-dependent. If your NVIDIA or AMD driver is outdated, corrupt, or the wrong version (e.g., a Studio driver vs. a Game Ready driver), the software may fail to initialize the DirectX or Vulkan channels properly.

Sometimes, background processes interfere.

Once fixed, take these proactive measures:

For the Developer (Fixing the Code):

  • Add Context: If this channel is required for the plugin to work, do not silently skip. Throw a specific exception or alert the user to reinstall.
  • Dependency Checks: Implement a startup validation routine that checks for file existence before attempting to load the channel.

    • For the User (Immediate Workaround):

    The steps provided are general troubleshooting measures. The exact solution might vary depending on the specifics of your situation, such as the version of Lumion you're using and any recent changes to your system or software environment. If the problem persists, engaging with the Lumion community or professional support can offer more tailored advice.

    "Channel not found in installation skipping load routine top"

    in Lumion typically indicates that critical software components (often

    files) are missing or being blocked by security software. This is common in versions like Lumion 10, 11, and 12. Primary Fix: Restore Quarantined Files The most frequent cause is Windows Defender

    or third-party antivirus software mistakenly flagging and quarantining Lumion files, such as command_d.dll Check Protection History : Open the Start Menu Update & Security Windows Security Virus & threat protection View Quarantined Items : Click on Protection history and look for recently blocked items related to Lumion. Restore File : If you find a file (like

    C:\Program Files\Lumion [version]\Channels\System\command_d.dll and select Add Exclusions : To prevent it from happening again, go back to Virus & threat protection Manage settings Add or remove exclusions . Add the entire Lumion installation folder (usually C:\Program Files\Lumion [version] ) to the exclusion list. Secondary Troubleshooting Steps If the above does not work, try these steps in order: Run as Administrator : Right-click the Lumion.exe file or shortcut and select Run as administrator to ensure it has the necessary permissions. Repair Microsoft Visual C++ : Reinstall or repair the Microsoft VC++ Redistributables located in the folder within your Lumion installation directory. Check Installation Integrity : If files are permanently deleted, you may need to reinstall Lumion

    . Ensure your antivirus is disabled or the installer is added to exclusions during the process. Move Specific DLLs (For Lumion 10) : For some "Channel" related errors, moving onnxruntime.dll folder to the root Lumion installation folder (where Lumion.exe is) has been known to resolve startup issues. Quick Summary Checklist Potential Cause Antivirus/Firewall Block

    Restore quarantined files and add the Lumion folder to exclusions. Missing Permissions Always use Run as Administrator Corrupt Redistributables VC_redist.x64.exe from the Lumion Damaged Installation

    Perform a full reinstall if the "Channels" subfolder is empty. add an exclusion to a specific third-party antivirus like Norton or McAfee? How do you resolve start-up problems? - Knowledge Base