Known Issues in Autodesk Civil 3D 2026.1
This document lists known issues in Autodesk Civil 3D 2026.1.
| Dynamo |
| The Object.Geometry node returns null for rotated viewports. |
| The Object.Geometry and FeatureLine.Curve2D nodes produce incorrect geometry for intersecting feature lines. |
| The Label.SetReferencedObject and Label.ReferencedObjectByComponent nodes do not properly handle COGO points. |
| The Block.Import node can produce unexpected results when the block contains Civil Objects. |
| Horizontal Regression |
| In some cases, when changing detection parameters (De-Noise Data, Spiral Sensitivity, or Max Radius property) curvature plot can be incorrectly displayed in Horizontal Regression Analysis. |
| In some scenarios, Horizontal Regression Analysis can produce very short alignment entities. |
| In certain cases, created alignments within the Horizontal Regression Analysis may not be properly connected, resulting in gaps. |
| Project Explorer |
| The Pipe Network drop-down menu for Start/End Structure for Pipe run and Profile View is exceedingly long when there is a small number of structures. Clicking the drop-down menu a second time will force the correct width to display. |
