Resolving Guardian Role, Activity Tracking, and Licensing Issues Caused by System.Management.dll Conflicts

Overview

Guardian may not function correctly when a third-party add-in loads an incompatible version of the System.Management.dll library.

While this issue has been confirmed in Revit 2025 and 2026, it should not be considered limited to those versions. Any Revit environment in which a third-party add-in overrides the standard System.Management.dll provided by Revit may be susceptible to the same conflict.

Symptoms

You may see one or more of the following:

• Company Admins or Project Admins are incorrectly identified as standard end users
• The Licensing button in the Guardian ribbon is unresponsive
• User activity is not tracked as expected
• Guardian functions normally only when the conflicting add-in is disabled
• Diagnostic logs may reference a System.PlatformNotSupportedException

Known Cases

The following environments have been associated with this issue:

• Elum Tools: Confirmed in Revit 2025 and 2026.
• pyRevit: Confirmed in specific environments where incompatible libraries are loaded from runtime folders.

Resolution

Replacing the conflicting file is the recommended fix. This ensures Guardian can complete required system calls while preventing "missing file" warnings in the third-party add-in.

Note: Repeat these steps for every affected Revit version installed on the machine.

1. Locate the Revit Version: Go to your Revit Program folder (e.g., C:\Program Files\Autodesk\Revit 2025) and copy System.Management.dll.
2. Locate the Add-in Folder: Navigate to the folder of the conflicting add-in (e.g., ...\Addins\2025\!ElumTools.bundle).
3. Overwrite the File: Paste the Revit version of System.Management.dll into the add-in folder, choosing Overwrite when prompted.
4. Restart Revit.

Important Notes

• Updates: Future updates to the third-party add-in may reinstall the conflicting file, requiring a re-patch.

Further Assistance

If you have performed these steps and are still unable to access your Admin or Licensing features, please reach out to our support team.