Not enough boundaries for the contour (need at least 3) - Intergraph Smart 3D - Troubleshooting

Intergraph Smart 3D Troubleshooting Reference

PPMProduct
Intergraph Smart 3D
PPMCategory_custom
Troubleshooting
Version_SThreeD_Custom
12.1 (2019)

Meaning: The evaluation of the opening or slab root outline geometry failed because there are not enough boundaries (at least three boundaries are required).

Recovery: Check the selected boundaries.