Cannot apply final trim to the input geometry. The Active Entity does not exist in the geometry's history - Intergraph Smart 3D - Troubleshooting

Intergraph Smart 3D Troubleshooting Reference

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Intergraph Smart 3D
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Troubleshooting
Smart 3D Version
11 (2016)

Meaning: Cannot apply final trim to the input geometry. The Active Entity does not exist in the geometry's history. Plate part has been corrupted.

Recovery: Reapply boundaries and re-compute plate part. If unsuccessful, report steps taken to your support group.