You cannot force the 64-bit AutoCAD to read the 32-bit CivilCAD kernel. So, we use a trick from the old IT playbook: Side-by-side installation.
Here is the stable workflow for engineers, not programmers:
Install CivilCAD 2008.
The "Memory Patch" (Critical Step).
Released in 2007–2008, CivilCAD 2008 was optimized for AutoCAD 2008 (32-bit). Its key features:
CivilCAD 2008 was distributed as ARX (AutoCAD Runtime eXtension) and CUI (Custom User Interface) files, tightly coupled to AutoCAD 2008’s specific API (ObjectARX 2008). It relied on the acad.exe memory model – a hard 32-bit address space. civilcad 2008 para autocad 2010 64 bits
Even with the hotfix, this is legacy software. Here is the reality:
| Issue | Solution |
| :--- | :--- |
| Crash on "Calculate Earthworks" | Run the command a second time immediately. First pass initializes memory; second pass computes. |
| Open/Save dialog missing | Set FILEDIA = 1. If persists, type CIVILCADOPTS → Reset dialogs. |
| Point marker display fails | Change your graphics driver in AutoCAD 2010: 3DCONFIG → Manual Tune → Choose "DirectX 9" (not 10 or 11). |
| Printing causes fatal error | Use AutoCAD’s native -PLOT command (with hyphen) to bypass CivilCAD’s custom plot routine. |
This is the most common query: "I have CivilCAD 2008. Will it install on my 64-bit AutoCAD 2010?"
The short answer is Yes, with caveats.
| Component | Status | Notes | | :--- | :--- | :--- | | CivilCAD 2008 Core | Partial | The main ARX (AutoCAD Runtime eXtension) files for 64-bit were released late. Ensure you have CivilCAD 2008 build 08.00.06 or higher. | | 2D Tools (Plans, Sections) | Full | Lines, hatches, dimensions, and annotations work flawlessly. | | Terrain Model (MDT) | Full | Creating grids, contours, and profiles works natively. | | Sewer & Hydraulic networks | Full | Calculation engines run as 64-bit processes. | | LISP Routines | Full | Custom scripts run faster. | | 3D Visualization | Partial | Some old OpenGL calls may flicker; use DirectX 9 mode in AutoCAD. | You cannot force the 64-bit AutoCAD to read
Crucial Warning: CivilCAD 2008 was released before AutoCAD 2010. The official 64-bit compatibility patch came via a hotfix from the developer (Domussoft/Diehl). Without that hotfix, the installer will block you, stating: "CivilCAD requires AutoCAD 2007-2009."
The Bottom Line: CivilCAD 2008 was never meant to see a 64-bit CPU, but AutoCAD 2010 64-bit doesn't have to be your only option. By stepping back to the 32-bit version of AutoCAD 2010 on modern hardware, you keep the old surveying beast alive.
Have you managed to get CivilCAD running on a newer version like 2016 or 2020? I’d love to hear your hacks (or horror stories) in the comments below.
Disclaimer: This post is for educational purposes regarding legacy software interoperability. Always ensure you have valid licenses for both Autodesk and CivilCAD products.
Installing CivilCAD 2008 para AutoCAD 2010 64 bits on modern Windows 10 or 11 requires a specific ritual. Follow these steps precisely: Install CivilCAD 2008
An ARX file is a compiled DLL that runs inside AutoCAD’s process space. A 32-bit DLL cannot be loaded into a 64-bit process – the Windows loader rejects it immediately. CivilCAD 2008 was compiled using Microsoft Visual C++ 2005 (or earlier) targeting x86. AutoCAD 2010 64-bit requires x64 binaries.
No amount of compatibility mode, administrator rights, or registry tweaks can fix this. It is a fundamental OS-level restriction.
The Good News:
The Quirks: