Error: Object reference not set to an instance of an object at Structure.TStructure.DetermineAllLimitPointsForAPlate ()

When opening a Diamonds model, you get the error:

Solution

• Take a topview and run the projection function on a random wall.
  The error might pop-up a few times while you do it. Keep hitting cancel.
• If this didn’t solve the issue, please send your Diamonds model (*.bsf-file) to the supportdesk (support@buildsoft.eu).