Revit datasmith exporter wishlist

Hi,I am using the datasimth plug-in of UE4 to export the model with revit, but I found several problems:

  1. When I package .exe, the result information shows success, but when I open the.exe file, it shows a black screen and an error (as shown in the attachment picture).However, the same scenario imported into ue4 4.20 does not have this problem.
  2. Can we realize the nesting relationship of revit nesting family in ue4 ?
  3. Can subclasses of revit be included in ue4 ?
    I hope to get your reply as soon as possible, thank you!