EM "Order not supported. Invalid boundary (Boundary.Count=2)" when opening an order in Model Builder

EM "Order not supported. Invalid boundary (Boundary.Count=2)"  or "Order non supported. Invalid boundary (Boundary.Count=1)"  happens when opening Model Builder after designing restorations in Dental Designer (no matter which restoration).

When opening Model Builder with this Error Message, model design is not possible. 

Root cause: Poor scan quality or wrong annotations placement.

Solution: Trim the scan in Dental Designer at Prepare step or use Refine scans option at Prepare Step in Dental Designer. In case if there are annotations that are placed wrongly, reset them manually.