I can't get past this

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1

Revit
d5render (6-15-22) error message

Well, it says D5 Converter 0.3.9 - Notice
Unable to cast object type
‘Autodesk.Revit.DB.FamilyInstance’ to type
'Autodesk.Revit.DB.Architecture.TopographyS…(message cuts off)

2

Hi Narlee, it seems a known issue for the converter which will be fixed in the next version.
For now, you can try this workaround: change the category of In-place Topography to anything else.