FATAL ERROR: unhandled e0434f4dh exception at 7c812afbh

Try uninstalling and then run CCleaner to remove any tombstones left over in the registry. Once clean try a fresh install once again.

Have you tryed simply reinstalling the software and any updates that are available on the autocad website?

Try checking in with the AutoCAD Community for additional visibility and potential solutions.


Philip
AutodeskCare' Community Manager
TW l PI l YT l BLOG

Hi,

This error could be occuring due to the fact that the Application is targetting a dll from an older version.

Uninstall all versions of Revit and Reinstall Revit Architecture 2011 as per the link below:

http://usa.autodesk.com/getdoc/id=TS13712572

I hope this works for you. Kindly reply for further assistance. Good Luck!
Thanks for using Fixya!
Mongkey
"Understanding explains better..."

http://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/Fatal-Error-Unhandled-Access-Violation-Reading-0x0000-Exception-at-bcbdad73h.html
Fatal Error while opening AutoCAD Dec 05 2014
Applies to AutoCAD 2009, AutoCAD 2010, AutoCAD 2011, AutoCAD 2012, AutoCAD 2013, AutoCAD 2014, AutoCAD 2015, AutoCAD Architecture 2009, AutoCAD Architecture 2010, AutoCAD Architecture 2011, AutoCAD Architecture 2012, AutoCAD Architecture 2013, AutoCAD Architecture 2014, AutoCAD Architecture 2015, AutoCAD Civil 3D 2009, ...
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Issue:

While in the process of starting AutoCAD , a Fatal Error occurs.

Causes:

Fatal errors usually indicate program corruption or a corruption somewhere within the operating system.

Solution:

There are several ways to address the problem:

• Reset AutoCAD to defaults (see How to reset AutoCAD to defaults).
• Rebuild the user profile in Windows (see Fix a corrupted user profile).
• Uninstall and reinstall the .NET Framework (see How to remove and reinstall the Microsoft .NET Framework).
• Uninstall and reinstall Visual C++ (see How to remove and reinstall Microsoft Visual C++ Runtime Libraries).
• Clear the digital signature icons and then uninstall and reinstall the application (see FATAL ERROR: Unhandled Access Violation Reading 0x0000 Exception at 4048b9h).
• Turn off Hardware Acceleration (see Starting AutoCAD-based products without hardware video acceleration).
• Update your graphics card driver. Install the latest driver from your video card manufacturer or use an AutoCAD-certified driver (see How to update your system to the latest certified video driver).

Note: A fatal error can be caused by DisplayLink Core software. If you have this installed on your system, try uninstalling it and then see if this resolves the issue. Additionally, some antivirus or desktop locking programs can cause errors in AutoCAD as they lock the system environment from working. Your antivirus may even need to be uninstalled.

http://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/Fatal-Error-Unhandled-Access-Violation-Reading-0x0000-Exception-at-bcbdad73h.html
Fatal Error while opening AutoCAD Dec 05 2014
Applies to AutoCAD 2009, AutoCAD 2010, AutoCAD 2011, AutoCAD 2012, AutoCAD 2013, AutoCAD 2014, AutoCAD 2015, AutoCAD Architecture 2009, AutoCAD Architecture 2010, AutoCAD Architecture 2011, AutoCAD Architecture 2012, AutoCAD Architecture 2013, AutoCAD Architecture 2014, AutoCAD Architecture 2015, AutoCAD Civil 3D 2009, ...
See More

Issue:

While in the process of starting AutoCAD , a Fatal Error occurs.

Causes:

Fatal errors usually indicate program corruption or a corruption somewhere within the operating system.

Solution:

There are several ways to address the problem:

• Reset AutoCAD to defaults (see How to reset AutoCAD to defaults).
• Rebuild the user profile in Windows (see Fix a corrupted user profile).
• Uninstall and reinstall the .NET Framework (see How to remove and reinstall the Microsoft .NET Framework).
• Uninstall and reinstall Visual C++ (see How to remove and reinstall Microsoft Visual C++ Runtime Libraries).
• Clear the digital signature icons and then uninstall and reinstall the application (see FATAL ERROR: Unhandled Access Violation Reading 0x0000 Exception at 4048b9h).
• Turn off Hardware Acceleration (see Starting AutoCAD-based products without hardware video acceleration).
• Update your graphics card driver. Install the latest driver from your video card manufacturer or use an AutoCAD-certified driver (see How to update your system to the latest certified video driver).

Note: A fatal error can be caused by DisplayLink Core software. If you have this installed on your system, try uninstalling it and then see if this resolves the issue. Additionally, some antivirus or desktop locking programs can cause errors in AutoCAD as they lock the system environment from working. Your antivirus may even need to be uninstalled.

If all of the above solutions fail to resolve the issue, and a full uninstall and reinstall of AutoCAD does not help (see Remove All Products from a Windows System), then you may need to reformat your hard drive and reinstall the operating system.
Article ID: kA230000000tTXu

this error points to locked files during startup, only known to me solution is complete removal of autocad from the system, it as well be indication that insufficient or faulty memory in the system.

i would suggest removal of autocad, reboot, install ccleaner, remove of all junk and clean of registry, then clean re-install of autocad,

if you have less than 512mb ram on winxp or less than 1024mb ram on vista, it can be a problem as well.

Try to uninstall any version of .NET framework installed on the system and install latest version of .NET. You can try to install 3.0 version.

How do I correct an "Unhandled Exception" error received while editing a scan from my all-in-one printer? Question : How do I correct an "Unhandled Exception" error received while editing a scan from my all-in-one printer? Answer : To correct an Unhandled Exception error received while editing a scan:

1. Open the Control Panel on your computer and double-click Display.
2. From the Display Properties window, click the Settings tab, and then the Advanced button.
3. From the "DPI setting" drop-down list, select Normal size (96 DPI).
4. Click OK and close all open windows.
5. Restart your computer for the changes to take effect.