Interoperability Between Versions

This topic describes how to open an AutoCAD Civil 3D 2018 drawing and view the AutoCAD Civil 3D objects in a prior version of the software. It also describes interoperability between AutoCAD Civil 3D 2018, AutoCAD Civil 3D 2018.1, and AutoCAD Civil 3D 2018.2.

Opening an AutoCAD Civil 3D 2018 Drawing in a Prior Version of AutoCAD Civil 3D

Drawings saved in AutoCAD Civil 3D 2018 use the AutoCAD 2018 drawing file format and must be saved to a prior drawing file format before they can be opened in a prior version of the software.

To open AutoCAD Civil 3D 2018 drawings and view the AutoCAD Civil 3D objects in a prior version of the software, set the PROXYGRAPHICS system variable value to 1 in AutoCAD Civil 3D 2018 to save the graphics with the drawing and then use the Save As command to save the drawing to a prior drawing file format. When you open the drawing in a prior version of the software, the AutoCAD Civil 3D objects will be displayed as proxy graphics.

Interoperability Between AutoCAD Civil 3D 2018 and AutoCAD Civil 3D 2018.1

Rehab Corridors

    Opening an AutoCAD Civil 3D 2018.1 drawing in AutoCAD Civil 3D 2018

  • If you open and save a drawing in AutoCAD Civil 3D 2018 that contains a rehab corridor created in AutoCAD Civil 3D 2018.1, and then re-open the drawing in AutoCAD Civil 3D 2018.1, the rehab corridor will not be affected and will appear as it was created.
    Note: You can also make edits to anything other than the rehab corridor in the drawing in AutoCAD Civil 3D 2018 without affecting the rehab corridor when the drawing is re-opened in AutoCAD Civil 3D 2018.1.
  • If you make an edit to a rehab corridor and it is rebuilt in AutoCAD Civil 3D 2018, the rehab corridor regions will disappear.

    If you save the drawing, when you re-open the drawing in AutoCAD Civil 3D 2018.1 the rehab corridor regions will not appear. To restore the rehab corridor regions, ensure that the rehab subassemblies have been imported in AutoCAD Civil 3D 2018.1, and then make an edit to the corridor and rebuild it.

    Note: The rehab subassemblies are imported automatically when you run the CreateRehabCorridor or EditRehabCorridor commands if they have not already been imported. You can also import the rehab subassemblies by using the AeccImportNewRehabContent command.

Projections and Crossings

    Opening an AutoCAD Civil 3D 2018 drawing in AutoCAD Civil 3D 2018.1

  • Linear objects that cross a sample line and are projected to section views in a AutoCAD Civil 3D 2018 drawing will be displayed as crossings when the drawing is opened in AutoCAD Civil 3D 2018.1.
    Note: Because these linear objects will be displayed as crossings in AutoCAD Civil 3D 2018.1 instead of projections, projection labels that were added to the objects in AutoCAD Civil 3D 2018 will be converted to crossing labels after you open the Section View Properties dialog box and click Apply in AutoCAD Civil 3D 2018.1.
  • Non-linear objects that are projected to section views in a AutoCAD Civil 3D 2018 drawing will be displayed as projections when the drawing is opened in AutoCAD Civil 3D 2018.1 and the Draw Crossings check box for those objects will be cleared by default on the Projections and Crossings tab of the Section View Properties dialog box.
  • A 3D solid projection that represents the solid exactly where the sample line crosses it in an AutoCAD Civil 3D 2018 drawing will have the same appearance when the drawing is opened in AutoCAD Civil 3D 2018.1. However, in AutoCAD Civil 3D 2018.1, the 3D solid will be displayed as a crossing and <Section> will be selected as the crossing marker style on the Projections and Crossings tab of the Section View Properties dialog box. The Draw Projections check box for the 3D solid will be cleared by default.
    Note: In previous releases, when AutoCAD Solids was selected on the Section tab in the Projection Style dialog box, the Section check box would appear. When the Section check box was selected for the projection style, the projection would be created to represent the solid exactly where the sample line crossed it. To replicate this appearance in AutoCAD Civil 3D 2018.1, select the Draw Crossings check boxes for the 3D solids on the Projections and Crossings tab of the Section View Properties dialog box (or in the Projections and Crossings Output Display Options dialog box), select <Section> as the crossing marker style, and clear the Draw Projections check boxes.

    Opening an AutoCAD Civil 3D 2018.1 drawing in AutoCAD Civil 3D 2018

  • A 3D solid crossing created in an AutoCAD Civil 3D 2018.1 drawing using the <Section> crossing marker style will be displayed as a projection when the drawing is opened in AutoCAD Civil 3D 2018 and will use either the As Drawn or Marker Style option in its projection style (depending on how the projection style it is assigned in AutoCAD Civil 3D 2018.1 is configured).

    To update the projection style in AutoCAD Civil 3D 2018 so that the 3D solid projection represents the solid exactly where the sample line crosses it, select AutoCAD Solids on the Section tab in the Projection Style dialog box, select As Drawn, and then select the Section check box.

  • Crossing labels created in AutoCAD Civil 3D 2018.1 will be displayed as proxy objects if the drawing is opened in AutoCAD Civil 3D 2018 and they cannot be deleted. If the drawing is saved in AutoCAD Civil 3D 2018 and re-opened in AutoCAD Civil 3D 2018.1, they will be displayed as crossing labels.
  • Projections and crossings that are hidden in a section view using AutoCAD Civil 3D 2018.1 will be shown if the drawing is opened in AutoCAD Civil 3D 2018. If the drawing is saved in AutoCAD Civil 3D 2018 and re-opened in AutoCAD Civil 3D 2018.1, they will be hidden.

Reference Templates

    Opening an AutoCAD Civil 3D 2018 drawing in AutoCAD Civil 3D 2018.1

  • All reference template components that are newly-supported in AutoCAD Civil 3D 2018.1 will be referenced into the drawing when a AutoCAD Civil 3D 2018 drawing is opened in AutoCAD Civil 3D 2018.1.
    Note: Newly-supported reference template components in AutoCAD Civil 3D 2018.1 include feature settings, label style defaults, drawing settings for object layers, abbreviations, and ambient settings, and AutoCAD layers, blocks, linetypes, and text styles. For information about how to specify which components to reference in AutoCAD Civil 3D 2018.1, see To Work With Reference Templates.

    Opening an AutoCAD Civil 3D 2018.1 drawing in AutoCAD Civil 3D 2018

  • All supported AutoCAD Civil 3D 2018 components in the reference template (rather than only selected components) will be referenced into the drawing if a AutoCAD Civil 3D 2018.1 drawing is opened in AutoCAD Civil 3D 2018.

    If the drawing is saved in AutoCAD Civil 3D 2018 and re-opened in AutoCAD Civil 3D 2018.1, all of the supported AutoCAD Civil 3D 2018 components in the reference template will be referenced.

  • Reference template components that are newly-supported in AutoCAD Civil 3D 2018.1 will not be referenced into the drawing if a AutoCAD Civil 3D 2018.1 drawing is opened in AutoCAD Civil 3D 2018.

    If the drawing is saved in AutoCAD Civil 3D 2018 and re-opened in AutoCAD Civil 3D 2018.1, the selection of newly-supported reference template components will be restored.

Label Override Glyph Visibility

  • Label override glyphs that are hidden from view using AutoCAD Civil 3D 2018.1 will be shown if the drawing is opened in AutoCAD Civil 3D 2018.

    If the drawing is saved in AutoCAD Civil 3D 2018 and re-opened in AutoCAD Civil 3D 2018.1, they will be hidden.

Interoperability Between AutoCAD Civil 3D 2018, AutoCAD Civil 3D 2018.1, and AutoCAD Civil 3D 2018.2

Vertical Curves in Offset Profile Slope Transition Regions

When opening a drawing with an offset profile in a different version of AutoCAD Civil 3D, the appearance of the offset profile in slope transition regions where vertical curves are present in the parent profile will be maintained until the offset profile is redrawn.

To redraw an offset profile, open the Profile Properties dialog box, navigate to the Offset Parameters tab, and click OK or Apply.

    Opening an AutoCAD Civil 3D 2018 or AutoCAD Civil 3D 2018.1 drawing in AutoCAD Civil 3D 2018.2

  • The tangents that are used instead of vertical curves in an offset profile slope transition region are maintained.
  • The tangents will be updated as vertical curves after the offset profile is redrawn in AutoCAD Civil 3D 2018.2.

    Opening an AutoCAD Civil 3D 2018.2 drawing in AutoCAD Civil 3D 2018 or AutoCAD Civil 3D 2018.1

  • The vertical curves in an offset profile slope transition region are maintained.
  • The vertical curves will be updated as tangents after the offset profile is redrawn in AutoCAD Civil 3D 2018 or AutoCAD Civil 3D 2018.1.

3D Solid Crossing Appearance in Section Views

    Opening an AutoCAD Civil 3D 2018.1 drawing in AutoCAD Civil 3D 2018.2

  • The appearance of a 3D solid crossing that uses the <Section> crossing marker style will be derived from the layer associated with the 3D solid rather than by the projection style associated with the 3D solid.

    Opening an AutoCAD Civil 3D 2018.2 drawing in AutoCAD Civil 3D 2018.1

  • The appearance of a 3D solid crossing that uses the <Section> crossing marker style will be derived from the projection style associated with the 3D solid rather than by the layer associated with the 3D solid.
Parent topic: Getting Started

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