FATAL ERROR: Unhandled Access Violation Reading 0x0000 Exception at 4048b9h!!

Auto Desk Autocad LT FATAL ERROR: Unhandled Access Violation Reading 0x0000 Exception at 4048b9h


When you tried to launch AutoCAD, the following error message was displayed and the product would not run.

error message


This error message indicates that the program installation has become corrupted. To correct the issue, the software needs to be reinstalled. This error occurs when certain files become locked during the uninstall/reinstall process. To reinstall AutoCAD correctly:

  1. Disable Digital Signatures:
    • On the Windows Start menu, enter acsignopt in the Search programs and files field and press Enter.
    • Clear the Validate Digital Signatures and Display Special Icons option.


2: Completely remove Autodesk software and reinstall.




Auto Desk Desktop Subscription Licensing Error: “Establish an Internet connection to continue!!

Subscription Licensing Error: “Establish an Internet connection to continue”


When you try to start the program, the following error is displayed: 

Establish an Internet connection to continue
The Auto desk license server cannot be found.  This problem can be caused by a variety of issues, including:

  • Internet connectivity has been lost.
  • The Auto desk license server is temporarily unavailable.


  • Security vulnerability that requires a licensing hotfix
  • Network connectivity blocked by a proxy server
  • Trovi or WAJAM preventing connection to the licensing server


Apply Security Hotfix and Troubleshoot Connectivity

If you are using an Autodesk 2014 or 2015 product, please apply this 

hotfix. If applying the hotfix does not resolve the issue, try these troubleshooting steps.

Windows OS:

Check the Internet Explorer connection settings

  1. Open Internet Explorer.
  2. Click Tools > Options.
  3. Access the Connections tab.
  4. Click LAN Settings. They should look like this:

  1. Click OK.
  2. Launch the product and test to make sure you can establish an Internet connection.

Check the Internet Explorer Advance settings 
* This solution applies after installing poodle hot fix or if you are running 2016

  1. Open Internet Explorer.
  2. Click Tools > Options.
  3. Access the Advanced tab.
  4. Scroll down and check ‘Use SSL 3.0’


  1. Click OK.
  2. Launch the product and test to make sure you can establish an Internet connection.

Additional Troubleshooting 
If you still can’t establish a connection, try the following:

  • Shut down and try to log in to Windows again.
  • Check that the machine time settings reflect the correct local time.
  • Check whether you are behind a proxy. It could be blocking the connection.
  • Check that antivirus software or firewall settings are not blocking Internet connectivity.
  • Rename the following Windows folder, appending a 2 to the folder name as:

Old name: C:\User\<username>\AppData\Roaming\Autodesk\ADUT\  
New name: C:\User\<username>\AppData\Roaming\Autodesk\ADUT2\

  • If you have administrator privileges, right-click the product icon (Revit, AutoCAD, and so on) and select Run as Administrator. Then close the program and reopen it normally.

Beginners Guide To AutoCAD


During the 1980’s, a group of engineers interested in simplifying how draftsmen, architects and engineers approach drawing projects, brain-stormed and came up with the idea of refining the difficult CAD processes that were popular in the 70’s. To do this, internal graphics controllers were in-built into microcomputers which allowed designers simply draw diagrams at the front end while internal graphic controllers replicated these diagrams from the back end. And in the following decades, this innovative process would revolutionize the world of designs.

In simple words, AutoCAD is a commercial software application used to draft 2 dimensional and 3 dimensional models with the aid of a computer. Although this description provides an all-encompassing explanation of what AutoCAD is used for, it does not break down its uses into the specialized units the software is known for. Therefore, I shall outline 5 practical ways in which the CAD software can be made used of.



ArchitectureAutoCAD provides its users with an intuitive user-interface that comes with built-in design lay-outs. These lay-outs include numerous templates that were specifically designed for architectural planning and building construction. So with an adequate knowledge of AutoCAD, anyone can take on projects that consist of designing architectural plans for construction purposes or building structures to be replicated in real-time.

Newer versions of AutoCAD also provide architects and builders with the analytical tools needed to analyze a building’s components and troubleshoot the stress and load levels of every support structure of a virtually designed building. This means that with AutoCAD, you can create an architectural plan, design a building and carry out specific analysis to know the building’s capacity and strengths before replicating it on a physical site.



industrial designThe drawing of engineering components, infrastructure designs and analyzing HVAC systems plays a major role in most engineering –Civil, Mechanical, Systems and Electrical engineering— fields. And to do this while minimizing human errors, the use of a computer aided design application is recommended.

AutoCAD is one of the recommended design software applications because it provides professionals in these niches with unique drafting tools that can be used to bring their engineering ideas to life with the accuracy they require. So in this stead, AutoCAD serves as software for designing mechanical components, analyzing electrical and piping systems and solving design issues that may arise.




graphic designAlthough there are arguable more advanced graphic design tools in the computer aided design community, AutoCAD’s innate features that enable its users plan out architectural spaces, map them out and take advantage of the available space makes it a formidable design tool that can be used simultaneously with 3D Max, Maya and other design/animation tools when the need arises.

AutoCAD supports the use of DWG and DXF files which can be exported from its interface to those of other advanced CAD applications to aid animation projects. This means that as an animator or graphics designer, you can take advantage of AutoCAD to create building structures and architectural plans which can now be exported for further design additions on advanced modeling applications.



PrinterTo create a 3D printed object, an individual must go through these three processes; choose the object, get a virtual 3D representation of the chosen object, and then feed the 3D printer this prototype to carry out the 3D printing process. It is clear to see—from the 3D printing process—that a model design tool or software definitely has a part to play and this is where AutoCAD comes in. With AutoCAD, 3D printing enthusiasts can create be-spoke 3D models on its workspace for use in the 3D printing process.

AutoCAD also ensures that file compatibility is not an issue for you can design your models on its interface and export your designs in the preferred ‘.stl’ format which most 3D printers and slicing software functions with.




fashionIt is important to understand that the design pattern of every diamond, shining stone or jewelry you have had the pleasure of either wearing or viewing did not come by chance but from careful design considerations and plans. AutoCAD is a design software that comes with required tools needed to draft and design virtually anything of your choice, and the design of certain fashion items is no exception.

This CAD software and intuitive interface, un-complicates the complications that comes with designing intricate shapes consisting of octagons, tetrahedrons and many more shapes you or I may have no knowledge of.




engineering draftingThe goal of every manufacturing and industrial organization is to make enough money to cover the cost accrued in producing any product and AutoCAD helps reduce that cost in many ways. With the use of its CAD interface, industrialists can design working prototypes of virtually any object as well as test its functionality during the design process.

AutoCAD provides the tools to both design the initial prototype as well as tweak its ergonomics before the need to sink money into the actually production comes up.




Is this the right kind of software for you?
Probably something that you have been looking for.


Buy it now at AISPLSTORE




AutoCAD LT vs. AutoCAD and AutoCAD Design Suite

AutoCAD LT is a cost-effective 2D drafting solution. AutoCAD software includes advanced documentation tools, 3D design, reality capture and software customisation. AutoCAD is also available as part of AutoCAD Design Suite.


AutoCAD LT 2016

AutoCAD 2016

AutoCAD Design Suite Premium 2016



Pay-as-you-go access

Up-to-date software

Online support

Scalable licensing


Smart Dimensioning

Revision cloud enhancements


PDF enhancements

Optimised PDF output

Multi-functional grips

Command line

File tabs

Tool palettes

Content Explorer

Dynamic blocks

Object and layer transparency

Sheet set manager/project

Express tools


Base, projected, section and detail views


Parametric constraints


Data extraction to tables





Point cloud dynamics UCS



Associative arrays

Centre of Polygon Object Snap

High-fidelity Line and Curves

ReCap point cloud tool


Co-ordination model


Point cloud snapping enhancements


Point cloud geometry extraction


3D solid/surface/mesh modelling


In-canvas tools




Visual styles








SKP file import


Raster-to-vector conversion tools


Conceptual design tools


Games-inspired visualisation



TrustedDWG™ technology

PDF™ and DWF™ publish/underlay

DGN™ Import/export/underlay

DWG™ convert

Autodesk A360 (US site) connectivity

Design feed

Geolocation system and live maps

3D printing


Import FBX, Inventor, IDES and others



Customisable user interface (CUI)

Selection effect

Support for CUI customisation

Online licence transfer utility

Migrate custom settings

Secure load

LISP/ARX scripting


Application programming interface (API)


Action recorder


Network licensing


CAD standards tools


Autodesk Exchange apps



Free trial

Free trial

Free trial




AutoCAD LT 2016 vs. AutoCAD LT 2015 and preceding versions

See how the latest release of AutoCAD LT compares to AutoCAD LT 2015, AutoCAD LT 2014 and AutoCAD LT 2013.


AutoCAD LT 2016

AutoCAD LT 2015

AutoCAD LT 2014

AutoCAD LT 2013



Multi-functional grips

Object hiding and isolation

Associative arrays

Clickable command line options


Property edit preview


File tabs


Intelligent command line


New Tab


Help Find tool


Dark theme


Ribbon gallery


Improved graphics


Lasso selection


Command preview


Resizable modelspace viewports



Smart Dimensioning


Revision cloud enhancements


PDF enhancements


Optimised PDF output


Mtext superscript and subscript tools


Text Align


Geometry measurement tools

Caps lock detection


PDF publish/underlay

Object and layer transparency

Blend curves

Strikethrough text


Multiple hatch object editing


Autobullets and numbering


Mtext match properties



DGN 8 import/export/underlay

DWG convert

A360 connectivity

Design feed with Autodesk 360 drawing storage


Geolocation co-ordinate system and live maps


Design feed with local drawing storage



Customisable user interface (CUI)


Selection effect (customisation)


Online licence transfer

Migration reset

Multiple plot file search paths

Customisation and support file sync


Secure load


Autodesk Application Manager


Sysvar monitor








AutoDesk Transition to Subscription Begins with AutoCAD LT

The Way You Buy Software in CHANGING!!!!!



 Autodesk will discontinue the sale of new perpetual licenses for Autodesk® AutoCAD LT® Family products in all APAC countries, except Japan, after October 31, 2015. This affects the following products:


Autodesk® AutoCAD LT®
Autodesk® AutoCAD LT® for Mac®
Autodesk® Inventor LT™
Autodesk® Revit LT™
Autodesk® AutoCAD® Inventor LT™ Suite
Autodesk® Revit LT™ Suite

Customers who have a perpetual license for an individual product, or who purchase a perpetual license before its end of sale, will be able to continue to use that license. Customers who have a perpetual license with Maintenance Subscription will receive software updates and corresponding benefits for as long as the subscription remains active.

As we said at One Team Extension, The Time is Now to have conversations with your customers about their choices for their software licenses and renewals.

Be sure to take advantage of the many tools available to you on One Team Source. We will continually refresh our library of sales tools, presentations, customer conversation starters and more as we continue to work through the transition to Desktop Subscription.




download (1)

Desktop Subscription provides access to desktop software at the lowest cost of entry. Choose from quarterly, annual and multi-year options for using Autodesk Design and Creation Suites software and select software products.

Stay competitive with Desktop Subscription

When you decide to purchase an Autodesk Desktop Subscription, you’re maximizing the power of your design tools while gaining control over your costs and the length of your commitment. Your software tools will always be up to date with the latest releases and enhancements, while your workflow will benefit from increased capabilities—from licensing options to more capabilities with Autodesk® cloud services.

Function and flexibility

Desktop Subscription supports a variety of licensing options designed to allow you to work the way you want, including:

• Full functionality—access to the same software you get perpetual Autodesk software licenses

• Install your software on multiple machines • Global Use Rights so you can work seamlessly from afar†

• Previous Version Rights†

• Access files stored locally on your computer, even without an active subscription

• Use free Autodesk tools to view your files in Autodesk file formats

• Start a new subscription and seamlessly pick up where you left off

Pay-as-you-go access

Whether your projects are temporary or ongoing, you can keep software costs manageable and predictable. Pay only for the access you need, without a large up-front investment.

Stay current

Stay current and competitive with the latest Autodesk technology. With Desktop Subscription, you know that you’re working with the most up-to-date software releases with the level of support you need.

Scalable licensing

Companies grow. Projects expand. Employees move. Be prepared for whatever changes come your way with licensing that scales to meet your organization’s needs.

Additional cloud services and software

Work smarter without tying up your desktop. Get access to additional services in the cloud, such as faster rendering and visualization capabilities, collaboration tools, and secure storage.