Loss of vectors when importing to Aspire

After creating a rectangle, push/pull for depth and creating a dado. I save the file and when imported into Aspire I only receive the outside dimensions with no dado. Unable to import any vector but outside dimension. Has to operator error - but where. I have save as 2017-2019 Sketchup file to no avail.

Sounds to me as if Aspire is only recognizing the component/group bounding box or at least only the perimeter of the shape. Have you contacted Customer Support for Aspire? Seems like they are the ones that should have the answer for you.