Are you a software developer who wants the best way to reduce anxiety after a stressful day at work? Consider CBD gummies for anxiety. Observer has a list of the best CBD gummies for those interested.

Installing AutoCAD Architectural Desktop (ADT R14) on Windows 11

Posted on February 28, 2024 by simonbooth

As an existing AutoCAD Architectural Desktop (ADT R14) User, you most likely cannot do without your beloved AutoCAD ADT. With the latest hardware and required move to new Windows versions, trying to install your AutoCAD gives an error like this one…

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

“FATAL ERROR: HEAP ERROR”

MEM_BAD_POINTER

…all is not lost, follow these instructions to install your ADT R14 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 ADT R14

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…

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

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 R14 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 R14 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:\acadR14 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:\acadr14
  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

Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)

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 R14 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 R14 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:\acadR14 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:\acadr14
  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

When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**

Once your AutoCAD 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 newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“

Now reboot your PC

Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)

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 R14 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 R14 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:\acadR14 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:\acadr14
  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

navigate through each setup dialog as normal, with these exceptions…

Make sure you do a Typical Install (not a Full Install)
When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**

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 Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
3. Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
1. 1. Make sure you fully close the setup program.
  2. Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
1. Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)

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 R14 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 R14 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:\acadR14 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:\acadr14
  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

navigate through each setup dialog as normal, with these exceptions…
1. Make sure you do a Typical Install (not a Full Install)
2. When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**

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 Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
3. Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
1. 1. Make sure you fully close the setup program.
  2. Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
1. Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)

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 R14 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 R14 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:\acadR14 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:\acadr14
  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

In the AutoCAD setup program…

navigate through each setup dialog as normal, with these exceptions…
1. Make sure you do a Typical Install (not a Full Install)
2. When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**

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 Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
3. Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
1. 1. Make sure you fully close the setup program.
  2. Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
1. Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)

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 R14 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 R14 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:\acadR14 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:\acadr14
  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

In the AutoCAD setup program…

navigate through each setup dialog as normal, with these exceptions…
1. Make sure you do a Typical Install (not a Full Install)
2. When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**

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 Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
3. Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
1. 1. Make sure you fully close the setup program.
  2. Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
1. Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)

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 R14 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 R14 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:\acadR14 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:\acadr14
  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

Double click the zip file to open it and install the TLC application as normal. By the way, TLC stands for The Longbow Converter
Once installed, start the Longbow Converter App…
1. Now place your AutoCAD ADT R14 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 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 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 ADT R14 setup does not start after 45 minutes, read the Troubleshooting section below.
In the AutoCAD setup program…
1. navigate through each setup dialog as normal, with these exceptions…
  1. Make sure you do a Typical Install (not a Full Install)
  2. When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**

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 Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
3. Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
1. 1. Make sure you fully close the setup program.
  2. Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
1. Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)

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 R14 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 R14 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:\acadR14 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:\acadr14
  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

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.
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…

Double click the zip file to open it and install the TLC application as normal. By the way, TLC stands for The Longbow Converter
Once installed, start the Longbow Converter App…
1. Now place your AutoCAD ADT R14 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 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 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 ADT R14 setup does not start after 45 minutes, read the Troubleshooting section below.
In the AutoCAD setup program…
1. navigate through each setup dialog as normal, with these exceptions…
  1. Make sure you do a Typical Install (not a Full Install)
  2. When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\adtR14 (not Program Files\AutoCAD Architectural Desktop as usually prompted)**

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 Architectural Desktop’“, you will have to create a shortcut on your computer Desktop to your c:\adtR14\acad.exe by hand.
3. Again, do not reboot if prompted to do so
Once your AutoCAD setup has completed the installation…
1. 1. Make sure you fully close the setup program.
  2. Once the setup is closed the Converter will automatically fix the newly installed program files for you automatically (inside folder c:\adtR14). You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
1. Now reboot your PC
Once rebooted, you can now run your AutoCAD ADT R14, using Windows Explorer, navigate to c:\adtR14 and double click acad.exe (we recommend creating a Desktop shortcut for easy access)

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 R14 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 R14 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:\acadR14 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:\acadr14
  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

Installing AutoCAD R14 on Windows 11

Posted on January 14, 2022 by simonbooth

As an existing AutoCAD R14 user, you most likely cannot do without your beloved AutoCAD R14. With the latest hardware and required move to new Windows versions, trying to install your AutoCAD R14 gives an error like this one…

“FATAL ERROR: HEAP ERROR”

MEM_BAD_POINTER

…all is not lost, follow these instructions to install your R14 on Windows 11…

Ransomware Protection Windows 11 and AutoCAD

How to install AutoCAD R14

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…

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.
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…

Double click the zip file to open it and install the TLC application as normal. By the way, TLC stands for The Longbow Converter
Once installed, start the Longbow Converter App…
1. Now place your AutoCAD R14 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 R14 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 R14 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 R14 setup does not start after 45 minutes, read the Troubleshooting section below.
In the AutoCAD R14 setup program…
1. navigate through each setup dialog as normal, with these exceptions…
  1. Make sure you do a Typical Install (not a Full Install)
  2. When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\acadR14 (not Program Files\AutoCAD R14 as usually prompted)**

You must change the install path to c:\acadR14

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 R14’“, you will have to create a shortcut on your computer Desktop to your c:\acadR14\acad.exe by hand.
3. Again, do not reboot if prompted to do so
Once your AutoCAD R14 setup has completed the installation…
1. 1. Make sure you fully close the setup program.
  2. Once the setup is closed the Converter will automatically fix the c:\acadr14 program files. You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
1. Now reboot your PC
You can now run your AutoCAD R14, using Windows Explorer, navigate to c:\acadR14 and double click acad.exe

Troubleshooting

If your AutoCAD R14 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 R14 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 R14 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:\acadR14 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:\acadr14
  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

Installing AutoCAD R14 on Windows 7, Windows 8 and Windows 10

Posted on May 28, 2015 by simonbooth

Windows 16bit setup error – This app can’t run on your PC, check software publisher

“FATAL ERROR: HEAP ERROR”

MEM_BAD_POINTER

You can solve these problems easily using our Longbow Converter App – fix and manage your AutoCAD R14 on new versions of Windows 7, 8 and 10 64bit

How to install AutoCAD R14

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…

Obtain your copy of the Longbow Converter here
NOTE: We recommend turning off Windows UAC before installing AutoCAD R14
Start the Longbow Converter application…
1. Place your AutoCAD R14 CD in the CDRom Drive
2. Select the 2nd tab named “Old AutoCAD Installer Reviver“
3. Using the “. . .” button, select your AutoCAD R14 installation CD
4. Next, click the “Run Old Installer” button and follow the onscreen instructions
  1. Now, I know it’s unheard of these days, but at this point expect to wait up to 45 minutes for your AutoCAD R14 setup.exe program to appear, be patient…
5. Once the setup starts, stop and read the next steps all the way to the end! By the way, if your AutoCAD R14 setup does not start after 45 minutes, read the Troubleshooting section below.
In the AutoCAD R14 setup program…
1. navigate through each setup dialog as normal, with these exceptions…
  1. Make sure you do a Typical Install (not a Full Install)
  2. When you get to the installation folder input dialog **it’s vitally important to make sure you install to c:\acadR14 (not .\AutoCAD R14 as usually prompted)**
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 R14’“, you will have to create a shortcut on your computer Desktop to your c:\acadR14\acad.exe by hand.
3. Again, do not reboot if prompted to do so
Once your AutoCAD R14 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:\acadr14 program files. You should see “Success!” displayed in the 3rd tab named “Old AutoCAD Program Reviver“
3. Reboot your PC
Now you can happily run your AutoCAD R14 on Windows 7, Windows 8, or Windows 10 32bit or 64bit…
1. Using Windows Explorer, navigate to c:\acadR14 and double click acad.exe

Troubleshooting

If your AutoCAD R14 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 R14 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 R14 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:\acadR14 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:\acadr14
  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

Longbow Software Blog

by Simon Booth

Tag Archives: FATAL ERROR: Heap Error

Installing AutoCAD Architectural Desktop (ADT R14) on Windows 11

“FATAL ERROR: HEAP ERROR”

MEM_BAD_POINTER

Ransomware Protection Windows 11 and AutoCAD

How to install AutoCAD ADT R14

Troubleshooting

Troubleshooting

Troubleshooting

Troubleshooting

Troubleshooting

Troubleshooting

Troubleshooting

Troubleshooting

Installing AutoCAD R14 on Windows 11

“FATAL ERROR: HEAP ERROR”

MEM_BAD_POINTER

Ransomware Protection Windows 11 and AutoCAD

How to install AutoCAD R14

Troubleshooting

Installing AutoCAD R14 on Windows 7, Windows 8 and Windows 10

“FATAL ERROR: HEAP ERROR”

MEM_BAD_POINTER

How to install AutoCAD R14

Troubleshooting