Civil 3D: Grading Issues – Duplicate items that can't be removed.

September 20, 2016 By Leo Lavayen Leave a comment

In a recent update and clean up of a Civil 3D template for a client, I ran into an issue with the Grading configuration.

The issue:

Looking at the Grading collection (from Settings tab of the Toolspace) there were Grading Criteria Sets and individual Criteria that are duplicates with a dot and number (.#) as prefixes. Even in a clean and empty drawing, you will not be able to erase them. If you attempt this, you might find yourself in an unexpected software crash, regardless of the Service Pack.


Tagged with Tech Support, Civil 3D, Styles, Grading, Support, akn_include

Civil 3D 2017 What’s New: Siteless Feature Lines

May 11, 2016 By Leo Lavayen Leave a comment

Since the release of Civil 3D Feature Lines, their interaction has plagued us.  We discussed this very issue in a previous 2014 blog article, Grading Gone Wrong.


 Autodesk took the hint and added in the use of Feature Line styles to control the Split point resolution within the Sites > Feature Lines > Properties…


Tagged with Civil Engineering, Feature Lines, AEC, Infrastructure, Civil 3D, AutoCAD Civil 3D, Grading, Civil Infrastructure, Alignments, Software Alignment, feature line, Civil 3D 2017

Casual Corridors: Removing the Bow Tie

January 07, 2015 By Leo Lavayen Leave a comment

When the corners get tight with sharp bends, corridor sections will begin to cross one another. This issue is known as a “Bow Tie."


Once a Bow Tie is created, the corridor will not behave as expected and corridor commands will experience issues too.

You can correct this issue a few different ways:

  1. Modify frequency and sampling settings.
  2. Add curve to the bend (PI).
  3. Use a custom assembly in region along with gradings.

Tagged with Bow Ties, Subassembly, Alignment Geometry Editor, bends, frequency, curves, Tech Support, Corridors, Infrastructure, tangents, Technology, Alignment, AutoCAD, spirals, Advanced Solutions, Grading, Assembly, Software, Autodesk

Grading Gone Wrong

August 04, 2014 By Leo Lavayen Leave a comment

I was recently teaching a custom Civil 3D class that involved some advanced grading and shared with the client some tips on use of Feature Lines and Grading Objects. I was able to show off the awesome powers of features and grading objects built in intelligence. That is how grading can interact with each-other.

Feature Lines in same SITE

If you still don’t know what I am talking about or have never seen it, what I am referring to is the ability that gradings created from separate feature lines in the same site and group, can clean up when they bump into each other.


Tagged with Feature Lines, Tech Support, Infrastructure, Grading Objects, Civil 3D, AutoCAD Civil 3D, Grading

Something Powerful

Tell The Reader More

The headline and subheader tells us what you're offering, and the form header closes the deal. Over here you can explain why your offer is so great it's worth filling out a form for.


  • Bullets are great
  • For spelling out benefits and
  • Turning visitors into leads.

Subscribe to Email Updates

Recent Posts


see all

Follow us on Twitter

Blogs We Follow

At Land's End (Infrastructure)
Being Civil (Infrastructure)
Being Inventive (Manufacturing)
Between the Lines (Design)
Beyond Design (Building)
Cracking The Vault (Manufacturing)
Line//Shape//Design (Autodesk)
Lynn Allen's Blog (Autodesk)
The Revit Clinic (Building)
Up and Ready (Support)
Without A Net (Support)