Fixed Issues in Autodesk Civil 3D 2026
This document lists product fixes included in Autodesk Civil 3D 2026.
| Assemblies and Subassemblies |
| Fixed an issue in which solids from distant regions were incorrectly connected when extracting solids from a corridor. |
| Fixed an issue in which the DaylightMultiIntercept subassembly did not work correctly with its intercept number setting. |
| Fixed an issue in which the top width parameter of subassemblies was not recognized when the value was set to a decimal. |
| Removed the parameter slope direction from the subassembly LinkSlopeAndVerticalDeflection as it did not serve a purpose. |
| Fixed an issue in which the output parameters of subassemblies with the same name in one assembly could not be selected when the option Parameter Reference Use was selected. |
| Fixed an issue in which the assembly name after copy-paste was not incremented properly. |
| COGO Points |
| Fixed a stability issue when selecting multiple COGO Points from the Edit Points Panorama or the Table in Prospector while the Properties palette was displayed. |
| Fixed a stability issue when selecting multiple Pipe Network parts from either the Panorama or the table in Prospector while the Properties palette was displayed. |
| Fixed a stability issue when selecting multiple Pressure Network parts from either the Panorama or the table in Prospector while the Properties palette was displayed. |
| Coordinate Systems |
| Fixed issues in which some elements of the Assign Coordinate System dialog box were not localized. |
| Corridors |
| Fixed an issue in which feature lines extracted from a corridor moved after splitting the corridor region. |
| Fixed an issue in which a layer for the solids extracted from one corridor changed to the current layer after adjusting its source DWG file. |
| Fixed an issue in which hatches displayed inconsistently from the top view when different hatches were used on the top and bottom links at the same position. |
| Fixed a stability issue when a drawing contained invalid hatches. |
| Fixed an issue in which corridor links could not be selected if multiple section data was attached to sample lines when executing the command aeccreportcorridorslopestake. |
| Fixed an issue in which a redundant subassembly displayed in the section view. |
| Fixed an issue in which an alignment used as multiple corridor baselines caused the Corridor Points to report only points for the first baseline. |
| Fixed an issue in which a warning message displayed multiple times for each corridor when running aeccreportcorridorslopestake. |
| Improved error messaging while executing a Corridor Slope Stake report to provide correct information about the encountered issue. |
| Fixed an issue in which solids could not be extracted from LinkMulti subassemblies. |
| Fixed an issue in which a gap would occur when creating a region that started or ended at a station close to a geometry point. |
| Added the ability to edit the Slope format and precision in the Corridor Lane Slope Report. |
| Improved warning messaging reflect the actual product nomenclature when executing Corridor Slope Stake report. |
| Cross Sections |
| Fixed an issue in which ExistingGround CrossSect changes appeared different after re-importing and re-exporting. |
| Added the ability to Shift-select multiple sources on the Sample more sources tab of the Sample line dialog box. |
| Fixed an issue in which materials could not be changed in the Change Volume Tables dialog box under the table list. |
| Data Shortcuts |
| Improve the stability when setting data shortcut project. |
| Dynamo |
| Fixed an issue in which certain surface types returned as objects instead of surfaces. |
| Fixed an issue in which the Object.Color node would not return the correct color when the given object's color was set to ByLayer. |
| Fixed an issue in which the CogoPoint.SetName node would display a warning message when setting the COGO point name to its current name. |
| Fixed an issue in which the Get COGO Point Group node in automatic run mode returned results even though no inputs were provided. |
| Fixed an issue in which the Layer.ByName node would not allow modifications to the current layer. |
| Fixed an issue in which True/False property definitions created with the PropertySetDefinition.AddManualPropertyDefinition node caused Civil 3D to hang when accessed by the Style Manager dialog. |
| Fixed an issue in which the PropertySetDefinition.AddManualPropertyDefinition node did not set the correct default value based on the property data type. |
| Fixed an issue in which list definitions created using the PropertySetDefinition.AddManualPropertyDefinition node would not have the correct default value. |
| Fixed an issue in which the PropertySetDefinition.AddAutomaticPropertyDefinition node would not correctly set the automatic property source. |
| Fixed an issue in which the Viewport.TargetPoint node would incorrectly return the origin in certain cases. |
| Fixed issues in which the Viewport.PaperToModelTransform and Viewport.ModelToPaperTransform nodes would return incorrect coordinate systems in certain cases. |
| Fixed issues in which the Viewport.PointFromPaperToModel and Viewport.PointFromModelToPaper nodes would return incorrect points in certain cases. |
| ESRI GIS Data Integration |
| Fixed an issue in which publishing data with CS CzechJTSK/5b.Krovak resulted in the wrong location reported in ArcMap Online. |
| Fixed an issue in which importing an ArcGIS feature layer with an elliptic arc segment in the geometry as a 3D polyline or feature line failed. |
| Fixed an issue that caused a login failure to the ArcGIS enterprise portal with Windows authentication. |
| Feature Lines |
| Fixed an issue in which some corridor feature lines incorrectly generated when extracting all feature lines from a corridor. For corridors where this problem occurred must be rebuilt before extracting all feature lines or this problem will still exist. |
| Gravity Pipes |
| Fixed an issue in which the Station Equation value was not shown correctly in a crossing pipe profile label. |
| Fixed a stability issue that could occur with conflicting parameters in a customized pipe network catalog. |
| Intersections |
| Fixed an issue in which Offset Alignment (Widening) was displaying an incorrect Left value for both Left and Right Widening. |
| Large Model Viewer (LMV) |
| Added spiral type a sub-entity property in the LMV output. |
| Miscellaneous |
| Fixed an issue in which negative radius values of the vertical curves of profiles could not be imported using the _AeccLandXMLIn command. |
| Improved a performance issue that occurred when exporting a layout to a model with the EXPORTLAYOUT command. |
| Fixed an issue in which the highlight preview when selecting an object was not working when using transparent commands. |
| Fixed an issue in which the startup value of BGcorepublish would not save when closing and reopening Civil 3D. |
| Fixed a stability issue that could occur when the drawing font directory path was changed. |
| Fixed an issue in which a custom view could not be saved. |
| Fixed an issue in which the annotative text style was set to an incorrect font style than expected from templates. |
| Fixed a stability issue that could occur when running API QTOUtility.GenerateXMLReport(). |
| Fixed a stability issue that could occur when using the UNDO function after creating Grading under certain conditions. |
| Object Modeler |
| Fixed an issue in which published surfaces would not sync correctly when drawing files contained proxy objects. |
| Parcels |
| Fixed an in which a parcel was appropriately split but not properly displayed as a closed entity when moving an alignment to the same site. |
| Pressure Pipes |
| Fixed an issue in which pressure fitting color was incorrect in Wireframe (Fast) view. |
| Fixed a stability issue that could occur when calculating an unexpected pressure fitting boundary. |
| Fixed an issue in which the List type property set could not be displayed in pressure fitting and appurtenance labels. |
| Fixed an issue in which pressure pipe labels displayed incorrectly when the AECPSDAUTOATTACH command was run. |
| Profiles |
| Fixed an issue in which the creation of an offset profile for an offset alignment was incorrect in certain situations. |
| Fixed an issue where for some scenarios the grid lines in Profile View/Section View were drawn incorrectly or were missing from certain parts of the view. |
| Project Explorer |
| Fixed a stability issue that occurred when a structure or pipe that did not reference a valid part in the parts catalog displayed in the Project Explorer window. |
| Fixed a stability issue that occurred when a pipe network was selected in the Project Explorer window and did not reference a valid Parts List. |
| Rail Design |
| Fixed an issue in which Applied Cant was not recalculating when the Start Station parameter was changed for a manual station. |
| Fixed and issue in which a 0 Cant value at the spiral of a C-S-S-C curve group occurred when two curves have opposite clockwise orientations. |
| Fixed an issue in which AUDIT commands incorrectly displayed an AeccDbRootSettingsNode(8C) error. |
| Reference Templates |
| Fixed an issue in which the override status of label components from a referenced template was not correct when reopening that drawing. |
| Fixed a stability issue that could occur when editing an assembly style or intersection style imported from a reference template. |
| Subassembly Composer |
| Fixed an issue in which elements from a tool box could not be dragged into a sequence workflow in subassembly composer. |
| Improved performance when opening or importing large PKT files. |
| Superelevation |
| Fixed an issue in which certain curve groups did not correctly import when an alignment was not imported from XML. |
| Surfaces |
| Fixed an issue in which surface points displayed or plotted when its style layer was turned off or frozen. |
| Fixed an issue in which the surface contour color changed when zooming in and out in Conceptual visual style with LOD mode enabled. |
| Fixed an issue in which a coordinate system could not be exported to DEM and impacted performance when exporting large surfaces with grid spacing 1.0. |
| Improved the performance of repeatedly exporting to DEM. |
| Fixed an issue in which surfaces created by Data Clip boundary are different if only the elevation of the clip boundary is different. |
| Fixed an issues in which TIFs created from Civil 3D could not be loaded to 3rd party applications. |
| Fixed an issue in which multiple swap edge selection messages appeared when swap edge did not succeeded. |
| Fixed an issue in which the first point did not highlight correctly in wireframe (fast) mode when selecting multiple surface points. |
| Fixed an issue in which deleting a surface breakline in Prospector would not display that it was out of date. |
| Fixed an issue in which a surface could not be created from GIS without an area of interest. |
| Fixed an issue in which extra create snapshot listing under definitions after linking/promoting a surface. |
| Fixed an issue in which surfaces from GIS Data were not created in Civil 3D using crossing selection. |
| Fixed an issue in which viewing a draped image appeared flipped in the Object Viewer with hardware acceleration enabled. |
| Fixed an issue in which surface boundary creation was generated differently from the intended source object. |
