Category Archives: AutoCAD 13 (R13)

AutoCAD R13 series

Installing AutoCAD for Windows 95 (LT95) on Windows 11

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As an existing AutoCAD LT95 user, you most likely cannot do without your beloved AutoCAD. With the latest hardware and required move to new Windows versions, trying to install your AutoCAD LT95 gives an error like this one…

Windows 16bit setup error - This app can't run on your PC

“This app can’t run on your PC”

or this one…

Setup Halted System requirements error Wrong OS, AutoCAD supports Windows NT 4.0, Windows NT 5.0, Windows 95 and Windows 98
“Wrong OS, AutoCAD supports Windows NT 4.0, Windows NT 5.0, Windows 95 and Windows 98”

…all is not lost, follow these instructions to install your LT95 on Windows 11…

Ransomware Protection Windows 11 and AutoCAD

Just before we start note that Windows 11 comes with a Ransomware Protection which includes Controlled Folder Access. Controlled folder access blocks applications from writing to your Documents, Pictures, Videos, Music, Public and Favorites folders. AutoCAD versions all the way to AutoCAD 2021 write to certain user Public folders and are therefore blocked by this feature. This can cause issues with all sorts of things including activating your AutoCAD license and even running AutoCAD. Ransomware Protection is an important feature of Windows 11 but it will affect your AutoCAD unless you allow AutoCAD and its dependent applications access to the controlled folders.

How to install AutoCAD LT95

A quick word of advice: please follow the instructions below precisely as documented including using the same folder names and paths. This will significantly reduce the risk of having any problems…

  1. If you don’t yet have a copy of the Longbow Converter App you can purchase it here or click on the download link we sent you via email in order to download the Converter App to your PC.
  2. Before installing the Converter App, make sure the files downloaded from our site are not blocked by Windows SmartScreen… Windows 11 is finicky, click the TLC zip first to make sure it’s fully selected then Right+click the file and select Properties. Be sure to check the Unblock checkbox as shown below and Click OK…
  1. Double click the zip file to open it and install the TLC application as normal. By the way, TLC stands for The Longbow Converter
  2. Once installed, start the Longbow Converter App…
    1. Now place your AutoCAD LT95 CD in the CDRom Drive
    2. In the Converter App, select the 2nd tab named “Old AutoCAD Installer Reviver“
    3. Using the “. . .” button, select your AutoCAD LT95 installation CD
    4. Next, click the “Run Old Installer” button and follow the onscreen instructions. If all is well a dialog will appear stating success, simply click OK to start your AutoCAD setup
      1. Now I know it’s unheard of these days, but at this point expect to wait up to 45 minutes for your AutoCAD LT95 setup.exe program to appear, be patient – NOTE: do not continue with the install until reading the next step…
    5. Once the setup starts, stop and read the next steps all the way to the end! By the way, if your AutoCAD LT95 setup does not start after 45 minutes, read the Troubleshooting section below.
  3. In the AutoCAD LT95 setup program…
    1. navigate through each setup dialog as normal, with these exceptions…
    2. Make sure you do a Typical Install (not a Full Install)
    3. When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\acadLT95 (not Program Files\AutoCAD LT95 as usually prompted)**
  4. Now carry on with the install
    1. Do not reboot once the install is complete
    2. Ignore any errors related to not being able to create the shortcut e.g. “Cannot Create folder ‘AutoCAD LT95’“, you will have to create a shortcut on your computer Desktop to your c:\acadLT95\acad.exe by hand.
    3. Again, do not reboot if prompted to do so
  5. Once your AutoCAD LT95 setup has completed the installation…
    1. Make sure you fully close the setup program.
    2. Once the setup is closed the Converter will automatically fix the c:\acadLT95 program files. You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
    3. Now reboot your PC
  6. You can now run your AutoCAD LT95, using Windows Explorer, navigate to c:\acadLT95 and double click aclt.exe

Troubleshooting

  • If your AutoCAD setup is not starting after 45 minutes…
    1. First try turning off UAC, rebooting, then restart the steps above.
    2. If it is still failing, most likely it’s because of another application on your system which is preventing our setup routine from starting (perhaps anti-virus, or similar) – try installing LT95 from Windows Safe Mode
  • If you are getting either a Bad Mem Pointer error and or a Smartheap handler recursively re-entered error when you start your AutoCAD then you need to re-run all the steps above, taking care to do each step precisely as it says, most likely you are missing from step 5 or you have not installed to c:\acadLT95 as stated in step (7) above.
  • When starting AutoCAD, if you receive an ‘acad.exe – System Error’ message: The program can’t start because ac1st15.dll is missing from your computer. Try reinstalling the program to fix this problem. If you carried out step (7) above, then try rebooting your PC
  • If you are getting a WinHelp() error when pressing F1 to try and access the Help system then simply install the WinHelp (WinHlp32.exe) module from Microsoft
  • Issues with Calcomp Digitizer – Calcomp Digitizer not working
  • If the setup displays an error message InstallError (IUO)               
    (X)  not enough space(IUO) try unplugging any External USB drives
  • Plotting issues? If you get an error splwow64.exe “The application was unable to start correctly” with error “0xc0000005”
    1. Make sure your Anti-virus and/or Windows Firewall is not blocking splwow64.exe
    2. If the problem persists
      1. First, note that you need the latest version of the Converter App
      2. Start the Converter App
      3. Select the 3d tab “Old AutoCAD Program Reviver” 
      4. Click the Tools Menu->Reduced Power Mode
      5. Using the “…” button, pick your acad.exe folder e.g. c:\acadLT95
      6. Click “Fix Old Program” and follow prompts
  • 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 2022 (c) Longbow Software

Uninstalling all Autodesk Products from your Computer

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Here’s a good one for you. We added a new tool in our Longbow Converter App which allows you to uninstall all Autodesk products from your computer in one go…

  1. Obtain your copy of the Longbow Converter here
  2. Start the Converter tool
  3. Click the Tools->Advanced->Uninstall all Autodesk Products menu…

    Uninstall All Autodesk Products

    Uninstall All Autodesk Products

  4. The Converter will now list all of the Autodesk products installed on your computer, you can press F5 to refresh. Select which ones you want to be uninstalled, then click Uninstall/Clean

    Uninstall and Clean

    Uninstall and Clean

  5. Note that you will have to interact with the setups, but the software does a really good job of cleaning everything off.

Copyright 2017 (c) Longbow Software

Opening AutoCAD DWG file gives “Drawing File was created by an incompatible version” message

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If you are trying to open a DWG file with AutoCAD and you get the message “Drawing File was created by an incompatible version” it’s because somewhere along the line your AutoCAD DWG files were saved with a newer version of AutoCAD.

All is not lost, you can make them open again in your version of AutoCAD, you just need to download the free DWGTrueView App from Autodesk – http://www.autodesk.com/products/dwg/viewers

Once installed, start DWGTrueview and open the DWG file in question, then save as making sure to select the lowest DWG file version that matches your version of AutoCAD.

Copyright 2017 (c) Longbow Software

Upgrading your existing AutoCAD to Windows 10 and Windows 11

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So you have an old PC with a working copy of AutoCAD and you want to upgrade to Windows 10? STOP and read this whole blog first before you wipe your working PC…

Autodesk License Activation for older versions of AutoCAD

That’s right, Autodesk no longer support versions of AutoCAD (at the time of writing 2014 or earlier) which means that they will not give you a new authorization code. That means you will have to activate your AutoCAD license without Autodesk – you do have some options:

  1. First try activation via this offline process that Autodesk recently added
  2. If you have an activation code, try an Offline Activation 
  3. Transfer your existing AutoCAD license from your old PC to your new PC. Your AutoCAD install CD comes with utility to do the job, see below…

    NOTE: A good idea (before transfering the AutoCAD license from your old PC to the new PC) is to setup AutoCAD to run in offline mode then clone your old PC hard drive. This ensures you have a backup of your old PC with a valid license.

    NOTE: Apparently, the license transfer will fail if your license is invalid. Some examples we heard about failing are: it’s a USA license running in a different country or it’s an Education License or you used a serial number that was compromised

    1. AutoCAD 2009 or older – transfer license using the Autodesk Portable License Transfer Utility

      NOTE: AutoCAD 2006/2007       users – you MUST install this patch so you do not lose your activation through a bug in the software once it is transferred to the new PC
    2. AutoCAD 2010 or newer – transfer license using the License Transfer Utility
  4. If you have an Autodesk Network licensing setup, keep it. Apparently, if you have this you are completely safe from shutdown and you can move to new systems without problems.
  5. Call Autodesk an explain your situation, we heard some people managed to get an activation code because their existing one was lost through software fault.
  6. Go back to an older version of AutoCAD. AutoCAD R13, R14, 2000, 2000i, 2002, 2004 and some versions of 2005 don’t require online activation therefore, as long as you have the original activation codes, they can still be used.
    • They all run perfectly on Windows 10, but you will need to install them using our Converter App (click for install instructions R13 R14 2000 2000i 2002 2004 2005)
    • If you have DWG files saved by newer versions of AutoCAD then simply use the free Autodesk DWGTrueview App (which is a cut down version of AutoCAD) to convert your DWG file save versions back to an earlier version.
  7. For information purposes only: There is an AutoCAD Keygen application online called “X-Force” which you can use to generate your authcode. NOTE: using a keygen is highly illegal when using hacked serial numbers, we don’t recommend it. Some ask if it is still illegal to use a keygen with a paid/valid serial number? You need to do your own legal checks on that question before using a keygen. 

Is it possible to protect your working AutoCAD from losing its license?

Yes. The latest version of our Converter App (12.30 or newer) has a new “Block Internet Connection” feature which disables all internet access to and from your AutoCAD, this makes it impossible for your AutoCAD license to be deactivated at some point in the future (with the disadvantage that you lose any internet based features in AutoCAD)

Windows XP and Windows Vista AutoCAD users upgrading to Windows 10

For those of you who are still running AutoCAD on Windows XP and want to upgrade to Windows 10, you will need to

  1. Get a new Windows 10 PC, preferably one without (or disabled) Intel onBoard graphics.
  2. Once you have a Windows 10 PC, run Windows Update until there are no more updates left to be installed.
  3. Next, install your AutoCAD using the Converter app…
    1. click on the version of AutoCAD you have (it explains all that you need to do) : AutoCAD R14 AutoCAD 2000 AutoCAD 2000i AutoCAD 2002 AutoCAD 2004 AutoCAD 2005 AutoCAD 2006 AutoCAD 2007 AutoCAD 2008 32bit AutoCAD 2009 32bit AutoCAD 2010 32bit AutoCAD 2011 32bit AutoCAD 2012 32bit AutoCAD 2013 32bit AutoCAD 2014 32bit 
    2. NOTE: If you can’t find your version listed, use the “Search” at the top left of this page
    3. Transfer the AutoCAD license as described above

Windows 7, Windows 8 and Windows 8.1 AutoCAD users upgrading to Windows 10

Here’s how to upgrade your PC to Windows 10 so that you can carry on using AutoCAD…

  1. Transfer your existing AutoCAD license from your old PC to your new PC. Your AutoCAD install CD comes with utility to do the job, see below… (A good idea is, before you transfer the AutoCAD license from your old PC to the new PC clone your old PC hard drive. This ensures you have a backup of your old PC with a valid license)
    1. AutoCAD 2009 or older – transfer license using the Autodesk Portable License Transfer Utility

      NOTE: AutoCAD 2006/2007 users – you MUST install this patch so you do not lose your activation through a bug in the software once it is transferred to the new PC
    2. AutoCAD 2010 or newer – transfer license using the License Transfer Utility
  2. Next, uninstall all AutoCAD versions on your system; it’s very important that you do this, if you don’t the Autodesk licensing system may get corrupted when you upgrade to Windows 10 at which point you will have to wipe the computer and start again.
  3. Now Upgrade to Windows 10
  4. Obtain the latest Longbow Converter supporting Windows 10 here
  5. Next, install your AutoCAD using the Converter app…
    1. click on the version of AutoCAD you have (it explains all that you need to do) : AutoCAD R14 AutoCAD 2000 AutoCAD 2000i AutoCAD 2002 AutoCAD 2004 AutoCAD 2005 AutoCAD 2006 AutoCAD 2007 AutoCAD 2008 32bit AutoCAD 2009 32bit AutoCAD 2010 32bit AutoCAD 2011 32bit AutoCAD 2012 32bit AutoCAD 2013 32bit AutoCAD 2014 32bit 
    2. If you can’t find your version listed, use the “Search” at the top left of this page
    3. AutoCAD 2006/2007 users – you MUST install this patch so you do lose your license activation randomly 
  • What happens if you already upgraded to Windows 8.1 with your existing AutoCAD installation – most likely your AutoCAD will not run, nor will you be able to repair it. The best thing to get your AutoCAD running again is to carry out a Windows Reset.

Users of 32bit AutoCAD versions 2002 thru 2013 and running or Windows 7 upgrading to Windows 8.1

If you have a working Windows 7 machine and you are thinking to upgrade to Windows 8.1 best just stay where you are. Better to upgrade to Windows 10, aside from being a free upgrade, it seems to be a much better platform too.

With that said, if you must upgrade your working Windows 7 system to Windows 8.1, then it is of course possible using our Longbow Converter tool – you ***must*** first uninstall all AutoCAD products before doing the upgrade. Once Windows 8.1 has been installed, just use the Longbow Converter to re-install your 32bit AutoCAD software as before.

  • What happens if you already upgraded to Windows 8.1 with your existing AutoCAD installation – most likely your AutoCAD will not run, nor will you be able to repair it. The best thing to get your AutoCAD running again is to carry out a Windows Reset.

Users of 64bit AutoCAD versions 2002 thru 2013 and running or Windows 7 upgrading to Windows 8.1

If you have a working Windows 7 machine and you are thinking to upgrade to Windows 8.1 best just stay where you are. Better to upgrade to Windows 10, aside from being a free upgrade, it seems to be a much better platform too.

With that said, if you must upgrade your working Windows 7 system to Windows 8.1, then it is of course possible using our Longbow Converter tool – you ***must*** first uninstall all AutoCAD products before doing the upgrade. Once Windows 8.1 has been installed, install your 64bit AutoCAD products as normal then use the Longbow Converter to fix all 64bit AutoCAD 2008 thru 2013 Windows 8 issues

Copyright 2020 (c) Longbow Software

 

Installing AutoCAD R13 on Windows 7, Windows 8 and Windows 10

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Installing your AutoCAD R13 on Windows 7, Windows 8 or Windows 10 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.

A quick word of advice: best to follow the instructions below precisely and to the letter, including folder names and paths, that way you will reduce the risk of having any problems…

How to install AutoCAD R13

  1. Obtain your copy of the Longbow Converter here
  2. Using Windows Explorer, copy your entire AutoCAD R13 CD to your hard drive, to a folder path c:\Autodesk\acadR13
  3. Start the Longbow Converter tool, select the 2nd tab, pick the c:\Autodesk\acadR13 folder, and click Run. Read and understand all the prompts before pressing OK. Now, I know it’s unheard of these days, but at this point expect to wait at least 45 minutes for your AutoCAD R13 setup.exe program to appear. Once the setup starts, stop and read the next step…
  4. In the setup program, navigate through each setup dialog as normal
  5. Now carry on with the install… Ignore any errors
  6. Once installed, go back to the Converter tool, select the 3rd tab, pick the newly installed c:\R13 folder and click Fix.
  7. Now you can happily run your AutoCAD R13
    1. Create a shortcut on your Desktop pointing to c:\R13\acad.exe (working folder c:\R13)

Troubleshooting

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 2021 (c) Longbow Software

Installing AutoCAD for Windows 95 (LT95) on Windows 7, Windows 8 and Windows 10

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AutoCAD for Windows 95 (LT95) users are very used to the software package and cannot do without it. With the latest hardware and required move to new Windows versions, trying to install your AutoCAD LT95 gives an error like this one…

Windows 16bit setup error - This app can't run on your PC

“This app can’t run on your PC”

or this one…

Setup Halted System requirements error Wrong OS, AutoCAD supports Windows NT 4.0, Windows NT 5.0, Windows 95 and Windows 98“Wrong OS, AutoCAD supports Windows NT 4.0, Windows NT 5.0, Windows 95 and Windows 98”

…all is not lost…

How to install AutoCAD LT95

Obtain your copy of the Longbow Converter here, you will need minimum version 7.16.

  1. Using Windows Explorer
    1. copy all of your AutoCAD LT95 disks to your hard drive, to a folder path c:\Autodesk\acadLT95 (Each disk should be in a numbered sub-folder off c:\Autodesk\acadLT95 e.g. c:\Autodesk\acadLT95\1
  2. Once you have copied all the disks, start the Longbow Converter tool
    1. select the 2nd tab named “Old AutoCAD Installer Reviver“
    2. pick the c:\Autodesk\acadLT95\1 folder (disk 1)
    3. Next click “Run Old Installer“.
      1. Read and understand all the prompts before pressing OK.
      2. Now, I know it’s unheard of these days, but at this point expect to wait at least 45 minutes for your AutoCAD LT95 setup.exe program to appear. Once the setup starts, stop and read the next step…
  3. In the setup program, navigate through each setup dialog as normal, except when you get to the installation folder, **it’s vitally important to make sure you install to c:\acadLT95 (not the Program Files (x86)\AutoCAD LT as usually prompted)**
    1. If prompted, do not reboot once the installation has completed
  4. Once installed
    1. go back to the Converter tool
    2. select the 3rd tab named “Old AutoCAD Program Reviver“
    3. pick the newly installed c:\acadLT95 folder and click “Fix Old Program“.
    4. Once the Converter has completed with “Success!”, close the Converter app, reboot your PC!
  5. Now you can happily run your AutoCAD for Windows 95 on Windows 10, Windows 7 and Windows 8 32bit or 64bit. Simply navigate to c:\acadLT95 using Windows Explorer, and double click aclt.exe.

Troubleshooting

Copyright 2018 (c) Longbow Software

AutoCAD File->Save or File->Open Crash…

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If are experiencing crashing problems using the File->Open or File->Save dialog inside of AutoCAD (or any other Autodesk product), there are a few items that can cause this:

  1. New HP Machine If you have recently purchased a new HP computer or you have an HP computer for which you have recently carried out an HP update on Windows 10, Windows 7, Windows 8 or Windows 8.1…Check if you have any of these applications installed:
    • HP Trust Center
    • HP Client Security Manager

      If so, uninstall them and reboot. We recommend you find an alternative as they cause this issue.

  2. For AutoCAD versions >= 2008, you can try disabling the InfoCenter toolbar at the top right of AutoCAD.
    1. If you know LISP, this code will work for all versions of AutoCAD 2008 or higher
      1. add this code to the end of your acad.lsp (vl-registry-write (strcat “HKEY_LOCAL_MACHINE\\” (vlax-product-key)”\\Applications\\InfoCenterAcConn”) “LOADCTRLS” 0)
    2. If you do not know LISP
      1. Start Regedit.exe
      2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\AutoCAD\<Release.Number>\ACAD-<VerticalCode>:<LanguageCode>\Applications\InfoCenterAcConn 
      3. Set the LoadCtrls value to 0
      4. To turn it back on, simply set LoadCtrls value to 76
  3. Remove all USB devices – older versions of AutoCAD don’t understand what a Samsung Phone is, and this can cause crashes.
  4. If you have been opening DWG files from an external drive (e.g. USB drive) try re-connecting the drive…
  5. The latest Windows Operating systems (Windows 7, Windows 8, and Windows 10) correctly enforce permission settings for your personal files (Documents folder etc). The problem is that your older version of AutoCAD does not understand these new permission settings, and this can stop you being about to open your DWG files and even cause AutoCAD crash. As a quick test, copy the DWG files that always crash when you save to a USB drive, then create a new folder called c:\MyDwgs, now copy the files from your USB to the c:\MyDwgs folder. Finally, try AutoCAD with the DWG files in c:\MyDwgs – is AutoCAD working now? If so, you can either leave your DWG files in that folder, or you’ll need to relax the permissions on your DWG folder to allow access to AutoCAD.
  6. MSN Plugin – if you see MSN as an entry in your Windows Explorer, uninstall MSN – AutoCAD doesn’t like this.
  7. For versions of AutoCAD >= 2000i here’s a quick fix to bypass the problem (although hard to remember each time) – on starting AutoCAD, type “Options” at the command line, select the ‘Files’ tab, click ‘Browse’, then simply click cancel. Now cancel out of the Options dialog altogether. Try your File->Open… Does it work? If so, you should now be good until the next time you start AutoCAD.
  8. If you have a non-HP machine that is giving you this issue or (2) didn’t work for you, please record below in the comments section:
    1. What computer make you are running
    2. What specific Windows version you are running
    3. What exact version of AutoCAD you are running (e.g. AutoCAD Architecture 2008 32bit)
    4. What AutoCAD service packs (if any) you have applied
    5. What anti-virus software you are running. We’ll see if we can solve this for you…
  9. Check out this page Interactions with the AutoCAD Ribbon crashes AutoCAD on Windows 10
  10. If all this fails, you can of course set FILEDIA = 0 at the command line to turn off the File Dialog User Interface
Copyright 2017 (c) Longbow Software

AutoCAD 32bit/64bit side-by-side installation compatibility chart

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This blog has been written to help advise those who require 32bit versions of AutoCAD to reside on the same computer system as 64bit versions of AutoCAD.

Before we start, when installing 32bit AutoCAD on 64bit Windows, you should take care not to mix the same version/series of AutoCAD 32bit with the same version/series of the corresponding 64bit version of AutoCAD, on the same computer. The reason is that they were not designed to run in a side-by-side configuration and therefore may conflict. The same rule can generally be made for all Autodesk products.

NOTES:

  • When installing 32bit AutoCAD, we advise that you uninstall all previous versions of 64bit AutoCAD before installing your 32bit version of AutoCAD.
  • If you are installing multiple versions of AutoCAD, you should always install in chronological order, in other words, oldest to newest.
    • e.g AutoCAD 2004, Architecture 2004, Map 2005, AutoCAD 2007, Civil3d 2015
    • Failure to follow this simple rule can render you with missing entry point errors, un-explained crashing, un-installable Autodesk software and more.
  • For best results, we recommend that you install only 32bit versions of AutoCAD on your computer system, however, mixing is possible with care – refer to the chart below if you must have the 64bit version installed on the same computer.

This chart shows which 32bit AutoCAD versions can be installed on the same system as 64bit AutoCAD versions…

  • Green means Should be OK
  • Red/Dark Red means Problems will occur, you should not do this

AutoCAD 32bit 64bit side by side configurations

Shows which versions of 32bit AutoCAD can be installed side by side to 64bit versions of AutoCAD

Copyright 2015 (c) Longbow Software