Knowledgebase : Autodesk > Common Errors

The License Manager is not functioning or is improperly installed. Revit will shut down now.

Many users have been encountering this error that's preventing them from launching their Autodesk CAD applications (such as Revit, AutoCAD or Inventor).

More often than not, this error seems to be occurring for users who have not recently run the Autodesk Desktop App, nor patched either their installed Autodesk CAD application, nor installed any of the provided Autodesk Licensing Hotfixes provided via the Autodesk Desktop Application.

To correct this problem, please run the Autodesk Desktop App (found via the Windows Start Menu), log into the app with your Autodesk User ID, and then run all available Autodesk CAD App Service Packs, patches and licensing hotfixes.

If your Autodesk Desktop App is loading, but failing to display any options and appearing completely blank, then you may need to uninstall the Autodesk Desktop App, and then reinstall the App using the below link;


If the problems persist, work through the troubleshooting steps listed on the below Autodesk KB article;


However as these steps are extensive, you're more than welcome to log a support ticket with the A2K Technologies support team for further assistance on this issue.



Phone: 1800 223 562

Windows v2004 Causing Autodesk Product Issues

Support - A2K Technologies

We have started to see a few clients moving onto Version 2004 of Windows in the last few weeks with various issues. 

  • CAD not launching;
  • Revit performance deterioration;
  • Products not installing with various failure warnings;
  • Products crashing on start-up with error pop-ups.

At the moment, we can see the issue lies in the C++ Libraries getting corrupted during the Windows Update.

If it's a FRESH INSTALL, we recommend the following steps:

  1. Uninstall C++ Libraries (C++ libraries will install on their own with the software installation);
  2. Clean uninstall the software in question;
  3. Run MSFixIt to clean up any registries and straggling files (sometimes there are multiple instances, so run MSFixIt until they are all clear);
  4. Reboot your computer;
  5. Reinstall the software using the Browser Method.

If it's a product that was ALREADY INSTALLED and started to act up, we recommend the following steps:

  1. Repair C++ Libraries;
  2. If it's still not working, un/reinstall C++ libraries;
  3. If still not working, Repair the product through Control Panel;
  4. If still not working, run a Reinstall through the Control Panel.