If you use VBA inside of 32bit AutoCAD you will have noticed that it is around 1000x times slower when running the same VBA code inside of 64bit AutoCAD.
This is because AutoCAD 64bit ships with the 32bit VBA DLL in a separate out-of-process executable rather than loading the VBA DLL inside of AutoCAD itself. Therefore, a lot of marshaling is incurred communicating between the out-of-process VBA executable and 64bit AutoCAD.
Other issues you may be seeing: Run-time error ‘429’: ActiveX component can’t create object
Affected, all 64bit versions of (and variants of)
AutoCAD 2008 | AutoCAD 2009 | AutoCAD 2010
AutoCAD 2011 | AutoCAD 2012 | AutoCAD 2013
AutoCAD 2014 | AutoCAD 2015
AutoCAD 2016 | AutoCAD 2017
NOTE: Autodesk stopped making 32bit AutoCAD since AutoCAD 2020
The solution to slow running AutoCAD VBA
The best solution is to install 32bit AutoCAD on 64bit Windows, here are the affected versions along with their solution text…
AutoCAD 2011 was not designed to run in Windows 10 (Windows 10 was released after AutoCAD 2011) and inevitably you will run into issues such as the infamous Ribbon crashing issue, slow startup problems, text scaling issues, etc.
You can automatically solve these problems using our Longbow Converter App, it fixes and manages the AutoCAD 2011 installation so that you can be up and running again… Just follow these easy instructions:
How to install 64bit AutoCAD 2011
First, uninstall any existing AutoCAD 2011 installations on your computer
Next, obtain the Longbow Converter App (V11.15 or higher), download here
Start the Converter tool
Pick the 1st tab named “AutoCAD 32bit Installer Converter“
Using your mouse, right-click the tab text “AutoCAD 32bit Installer Converter” so that it changes to “AutoCAD 64bit Installer Converter“
Next, using the “. . .“ button, select your AutoCAD installation CD and follow the instructions presented by the Converter tool user interface.
Once the conversion process is complete
click Install/Run Setup to start setup
Once you have completed the AutoCAD installation process…
Completely close the setup program
Go back to the Converter App and make sure it states “Success!“
Now you can run your AutoCAD as normal
– If you are unable to activate your product, or the activation process crashes: