Grading Optimization for Civil 3D 2022.1

Jul 28, 2021 – Autodesk releases Autodesk Grading Optimization for Civil 3D 2022.1

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The Autodesk Grading Optimization for Civil 3D 2022.1 Update is available via the Autodesk Desktop App or via download from the Autodesk subscription site.

The install requires access to the original install resources.

Grading Optimization for Civil 3D 2022.1

Autodesk Grading Optimization (GO) is an interactive tool that facilitates grading various land areas. GO consists of optimization algorithms that work toward surface smoothness while accommodating user-imposed constraints. These design constraints include grading and drainage elements.

GO requires access to an AEC Collection license.

This GO update includes significant fixes to the initial public Grading Optimization for Civil 3D 2022 release.

Fixed Issues

Civil 3D User Interface

  • Fixed an issue that caused the REDO command in Civil 3D to not work when Grading Optimization was installed.
  • Corrected a license error that could occur when starting Grading Optimization from Civil 3D.
  • Fixed an issue in which the Grading Objects Browser would not close automatically when closing a drawing in Civil 3D.
  • Fixed an issue causing duplicate objects to be shown in the Civil 3D Grading Objects Browser when copying entities that have Grading Object properties attached.
  • Fixed an issue in which the Grading Optimization Tool Palette continued to display when starting Civil 3D after the workspace had been saved with the tool palette turned off.
  • Fixed an issue in which some localized versions of Grading Optimization, sample files did not open correctly due to language specific characters in the installation file path.
  • Fixed an issue in which an unnecessary warning stated "Max elevation should be greater than or equal to min elevation" when creating a Bounded Point in Civil 3D .
  • Fixed an issue in which copying and pasting grading objects in a drawing could create additional entries in the Grading Objects Browser in Civil 3D.
  • Fixed an issue in which pressing F1 from the Grading Optimization tools on the Civil 3D ribbon would open the Civil 3D help and not the Grading Optimization help.
  • Fixed an issue in which changing the geometry used for a Building Pad constraint could open the geometry that is required to be closed.

Grading Optimization User Interface

  • Added an elevation offset warning and blocked entry when a minimum offset value entered was greater than the maximum offset value.
  • Fixed text wrapping issues that could overlap unit text in the grading object property dialog boxes.
  • Fixed an issue in which the Grading Object Property browser did not continue to appear after it was closed unless the object is deselected and reselected or another object was selected.
  • Fixed an issue causing the Grading Optimization Options dialog box to stretch horizontally while using multiple monitors.
  • Improved the layout of user interface components in localized versions of Grading Optimization.
  • Fixed an issue in which a deleted grading object in the canvas was not removed from the Grading Objects Browser.
  • Removed the resize icons from the Preferences, Optimization Options, and Visualization Settings dialog boxes as they are not intended to be resized.
  • Fixed an issue in which the Grading Object Property dialog opened whenever dragging a grading element in the Grading Objects Browser.
  • Fixed an issue in which the Zone and Pond Object Properties dialogs would not open to a size large enough to accommodate all of the properties listed.
  • Fixed an issue in which a grading object would not highlight when hovering the cursor over the object in the Grading Objects Browser panel when the dark theme was enabled.


  • Changed the default grading objectives to Smooth Surface only when first opening a drawing in Grading Optimization. Changes to the objectives will now be saved per drawing for all subsequent optimizations.
  • Fixed an issue causing Pond error messages to appear when resetting the optimization. Now the error messages only appear when starting an optimization.
  • Fixed an issue causing an installation error when required components were not installed first.
  • Fixed an stability issue that could occur when closing the Grading Optimization application after deleting a Grading Object in Civil 3D.
  • Fixed issues that caused elevation spikes in the terrain around building pads after optimization was run.
  • Added the ability to view optimization solver information in the Grading Optimization main.log file.

Sending Optimized Results

  • Removed the Basic tab from the Save Optimization Result dialog. All of the former Advanced tab features are now the default dialog.
  • Fixed an issue causing the wrong optimization results to be returned when returning results to Civil 3D after switching drawings in Civil 3D. Now the drawing being optimized will first be made active when returning optimization results.
  • Fixed an issue that would return an optimized surface originally created by LandXML to Civil 3D with an incorrect boundary.

See the Known Issues list

Read the Grading Optimization for Civil 3D 2022.1 Release Notes in the help