Unable to create geometry for [Turn feature name] , since previous and next straight features are overlapping. Please revise ProjectionX and/or ProjectionY value(s). - Intergraph Smart 3D - Help - Hexagon

Meaning: A trench run was created or modified in such a way that a trench turn feature's previous and next straight features overlap.

Recovery:

1. Select the trench turn feature in error.

2. Increase the lengths of the Sketch 3D segments in the Graphic View so that the previous and next straight runs do not overlap.

   -OR-

   Change the projection values in the Properties View so that the inside lengths of the previous and next straight runs do not overlap.