Why run 32bit AutoCAD on 64bit Windows


AutoCAD R13 | AutoCAD R14 | AutoCAD 2000 | AutoCAD 2000i |AutoCAD 2002 | AutoCAD 2004 | AutoCAD 2005 | AutoCAD 2006 | AutoCAD 2007

Users of these really old AutoCAD versions have literally been using them for over a century, and because of that fact moving to a new version of AutoCAD is extremely disruptive for them. Being able to run these on new versions of Windows is priceless.

AutoCAD installation error messages (Solved)
  • Wrong OS. AutoCAD supports Windows NT 4.0, Windows NT 5.0, Windows 95 and Windows 98
  • This app cannot run on your PC

These setup issues are completely solved by using our Longbow Converter solution.

Significant 3rd Party ObjectARX, VBA, VB6 investment

Some users can also run into issues where they have significant investments in 3rd party ObjectARX, LISP, VBA or VB6 applications that only run on their existing version of AutoCAD.

Our Longbow Converter solution allows them to be installed alongside these old versions of AutoCAD once again.



AutoCAD 2008 | AutoCAD 2009 | AutoCAD 2010 | AutoCAD 2011 |AutoCAD 2012 | AutoCAD 2013 | AutoCAD 2014 | AutoCAD 2015 | AutoCAD 2016 | AutoCAD 2017 | AutoCAD 2018 | AutoCAD 2019


AutoCAD installation error messages (Solved)

Users of these versions of AutoCAD are generally restricted from installing their AutoCAD with messages like

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

Solved by using our Longbow Converter solution.

Slow VBA Performance

Other users are impacted by severe performance issues when running their VBA code on 64bit AutoCAD. You may not even be able to run your VBA code on 64bit AutoCAD. This is because AutoCAD VBA runs in a completely separate executable (exe), away from AutoCAD on 64bit Windows, making it almost 1200 times slower than AutoCAD VBA running 32bit AutoCAD. Installing 32bit AutoCAD solves the problem and restores performance.

Solved by using our Longbow Converter solution.

Significant 3rd Party ObjectARX, LISP, VBA, VB6 investment

Some users can also run into issues where they have significant investments in 3rd party ObjectARX, VBA or VB6 applications that only run on their existing 32bit version of AutoCAD.

3rd party extensions like

  • Bentley Road, Bentley Inroads, Site Design, Bentley MX, Bentley WaterCAD, ProSteel 3D 
  • Microvellum Cabinet Maker, Smartlister, Vitruvian Built, SmartMachining, CGSurvey
  • Stabiplan’s StabiCAD and StabiBase, AutoStage Pro, EBOM Electrical, ER Mapper,
  • Softdesk AEC, Softdesk Building Systems, Softdesk Civil/Survey,  GE XA21 DBF
  • YFCAD InteriCAD 6000 7000 T5, CADCode/ACAM, Accubid CADLive, Keytrix, AutoTURN
  • Tyco Sprinkcad, SurveyMBS, Flairbase Amine, AutoNest, Easy Hatch, ProCAD, Mitek WoodEngine,
  • 20-20 CAP Studio, 20-20 SymbolSource for Allsteel, BlueCielo InnoCielo Meridian
  • CADKON, C & G Surveying software for AutoCAD, PAMCAD, FastrackCAD, EDMWire
  • GlobalCad Toolbox LT, ELCOVISION, APS for Architecture, Carson Survey, 3DConstructor
  • Mensch und Maschine, Basepoint, Softech PLM and RMData AutoCAD based products  
  • Mentor Graphics VeSys, faciliCAD, BOSS RiverCAD Pro, AutoCAD OEM, SOFiCAD (all SOFiSTiK AutoCAD plugins), and more!

Solved by using our Longbow Converter solution.

Make CAP Studio 20-20 work on 64bit Windows 7, Windows 8, and Windows 10

As a CAP Studio user, you need AutoCAD installed… But when you try installing AutoCAD you get one of these error messages…

  • 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. It cannot be installed on 64-bit Windows

Here’s how to get around those errors

How to install AutoCAD for use with CAP Studio 20-20

  1. Obtain your purchased copy of the Longbow Converter here
  2. Start In the Converter App and note the user interface
  3. Select the 1st tab named “AutoCAD 32bit Installer Converter
    1. Using the “. . .” button, selection your AutoCAD CD
    2. Next, click the “Convert button and follow instructions
  4. Once the conversion process is complete
    1. click Install/Run Setup to start setup
    2. Simply install as normal, remembering to…
      1. Close the setup program when finished.
  5. Once AutoCAD is installed, close the Converter app
    1. At this point AutoCAD will now run as normal!

Now that AutoCAD is installed, install CAP Studio…

  1. Insert your CAP Studio installation media and pick install as normal.
    • NOTE: The sentinel software may inform you that it failed to install, if it does, it will ask if you still want to carry on with the installation, simply pick Yes and let it install – it should work fine.
    • Once CAP Studio installs…
      • run AutoCAD as normal
      • Once AutoCAD has started up, type ‘CAP‘ at the AutoCAD commandline
      • Notice CAP Studio is now running perfectly on Windows 64bit inside of AutoCAD 32bit!

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