Visual Basic Applications run very slow in AutoCAD 64bit

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

The Solution:

The best solution is to install 32bit AutoCAD on 64bit Windows, here are the affected versions along with their solution text…

Copyright 2017 (c) Longbow Software

Installing 64bit AutoCAD 2011 on Windows 8, Windows 8.1 and Windows 10 64bit

Your 64bit AutoCAD 2011 was never designed to run on Windows 10, Windows 8 or Windows 8.1 64bit (these versions of Windows are newer than AutoCAD 2011). In order for your AutoCAD 2011 to run as it did in previous versions of Windows, you need to follow these easy steps…

NOTE: These steps do not bypass normal Autodesk licensing/authorization, you should expect to use your own serial numbers in the normal way.

  1. Obtain your copy of the Longbow Converter here
  2. Start the Converter tool
    1. Pick the 1st tab named “AutoCAD 32bit Installer Converter
    2. Using your mouse, right click the tab text “AutoCAD 32bit Installer Converter” so that it changes to “AutoCAD 64bit Installer Converter
    3. Next, using the “…” button, select your AutoCAD installation CD and follow the instructions presented by the Converter tool user interface.
  3. Once you have completed the AutoCAD installation process…
    1. close the setup program then start the Converter software
    2. Select the 3rd tab “Old AutoCAD Program Reviver
      1. Using the “…” button, pick the newly installed C:\Program Files\Autodesk\AutoCAD 2011 folder
      2. then click “Fix Old Program
  4. Now you can happily run your AutoCAD 2011 64bit on Windows 8 and Windows 10

Troubleshooting:

– If you are unable to activate your product, or the activation process crashes:

– If you have crashing problems using the File->Open or File->Save dialogs inside of AutoCAD please read this blog entry on the File->Open or File->Save Crash in AutoCAD

Copyright 2017 (c) Longbow Software