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 32bit AutoCAD 2008 on Windows 7, Windows 8 and Windows 10

NOTE: This blog post specifically solves issues related to these error messages on installation of 32bit AutoCAD 2008…

  • “This operating system is not supported by AutoCAD®”
  • “You cannot install this product on the current operating system”
  • “You are attempting to use a 32-bit installer on a 64-bit operating system”
  • “This is a 32-bit AutoCAD® 2008. It cannot be installed on 64-bit Windows”

Installing 32bit AutoCAD 2008 on Windows 7, Windows 8, Windows 8.1 and Windows 10 64bit can be very easily defined in these short 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. If you have CDs (if not check (3) below):
    1. Using Windows Explorer, copy Disk 1 of your AutoCAD 2008 CD to your hard drive, to a folder path c:\Autodesk\AutoCAD2008
    2. If you have more CD’s, copy them all directly over the top of Disk 1, overwrite all files in your previously copied c:\Autodesk\AutoCAD2008 folder
  3. If you have a single self extracting exe downloaded from Autodesk
    1. Run the exe, it will ask to unzip to a folder inside of c:\Autodesk, make a note of the folder for later use (we’ll refer to it from here as c:\Autodesk\AutoCAD2008), now click OK. Wait until all of the files have extracted, when they do, the AutoCAD 2008 setup will automatically launch – simply close it and move to the next step.
  4. Now, start the Longbow Converter tool, select the 1st tab, pick the c:\Autodesk\AutoCAD2008 folder, and click the Convert button.
  5. Once the conversion process is complete, click Install/Run Setup to start setup. Simply install as normal.
  6. Windows 8, Windows 8.1 and Windows 10 users: Once the installation process is complete, go back to the Converter, select the 3rd tab, pick the newly installed C:\Program Files (x86)\AutoCAD 2008 folder, then click ‘Fix’
  7. Now you can happily run your AutoCAD 2008 32bit on Windows 7, Windows 8, Windows 8.1 and Windows 10

Installing the AutoCAD 2008 Service Packs

Installing AutoCAD 2008 sp1

  1. Download the Download the AutoCAD 2008 sp1 zip from here (autocad2008lockedsp1.exe)
  2. Unzip the zip file and simply run the autocad2008lockedsp1.exe – 32-bit as normal


– 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 2015 (c) Longbow Software

Solving the AutoCAD Failed Installation, Aborted 1603 error

If you are receiving a 1603 error when installing AutoCAD, something like:

  • Install Microsoft Visual C++ 2005 SP1 Redistributable (x86) Failed Installation aborted, Result=1603 or
  • Install Microsoft Visual C++ 2005 SP1 Redistributable (x64) Failed Installation aborted, Result=1603 or
  • Install Microsoft Visual C++ 2008 SP1 Redistributable (x86) Failed Installation aborted, Result=1603 or
  • Install Microsoft Visual C++ 2008 SP1 Redistributable (x64) Failed Installation aborted, Result=1603 or
  • An error occured during installation of assembly Microsoft VC80.CRT version=…..

Here’s what you need to do:

  1. Open your Control Panel, click Programs and Features
  2. In the top right part of the Programs and Features window, there is a search box, search for ‘Redistributable‘ then press Enter
  3. Now uninstall all of the ‘Redistributable‘ entries that relate to your specific error, e.g. if you get a 1603 error for Microsoft Visual C++ 2008 SP1 Redistributable (x64) then uninstall that
  4. Once you have uninstalled all of them, now try your AutoCAD installer again…

Error code 1935 when installing AutoCAD 2008

If you are getting Error 1935. An error occurred during the installation of assembly ‘Microsoft.VC80.OpenMP.type=”win32″.version=”8.0.50727.42″ when installing your AutoCAD 2008, try these steps to resolve it:

  1. Delete all files (*.*) from your C:\Windows\System32\config\TxR folder
  2. Next start a cmd.exe prompt in administrator mode, then type at the command line:

    fsutil resource setautoreset true C:\

  3. Now Reboot
  4. Next install all Windows updates, rebooting until there are no more Windows Updates left to install
  5. Now try to install your AutoCAD 2008 again