Cannot export the 3D view: An item with the same key has already been added.

[devani_yogeshbhai]

This error message is popping up while trying to Export using Datasmith Exporter for Unreal Engine 5.1 using Revit 2021.

Cannot export the 3D view: An item with the same key has already been added. at Autodesk.Revit.DB.CustomExporter.Export(View view) at DatasmithRevitExporter.DatasmithExportRevitCommand.Execute(ExternalCommandData InCommandData, String& OutCommandMessage, ElementSet OutElements)

Any help how to solve it?

[azad.Nanva]

Use Export --> FBX, sometime DataSmith is not working or re install the Twinmotion plugins.