An attempt has been made to delete a connection item. These objects are system-generated and cannot be selected and deleted directly. - Intergraph Smart 3D - Administration

Intergraph Smart 3D Troubleshooting Reference

PPMProduct
Intergraph Smart 3D
PPMCategory_custom
Administration & Configuration
Version_S3D
12.x(2018)

Meaning: A connection must exist between two connected parts. You cannot delete this connection.

Recovery: Delete one of the adjacent features.