Revit/Revit LT: When installing 2021 or Later Error "Install Failed"

July 23, 2021 Jeff Arbogast


During the installation of Revit or Revit LT 2021 or later. You receive a message that states “Install Failed”.


  • You have less than 30 GB free disk space available on the Hard Drive.
  • There is a newer version of Generative Design for Revit installed on the system.
  • Does not meet the .NET Framework system requirements.

An invalid drive is detected during install.


To resolve this issue

  • Corrupted Revit/Revit LT Installer
  • Go to the folder C:\Users\<username>\AppData\Local\Autodesk\ODIS.
  • Open the file DDA.log in Notepad.
  • You may notice at the end “error: Exit code:15”.
  • Use this document to "Install failed" error with Revit 2021.1.1 and DDA.log indicates exit code 15”


  • Newer version of Generative Design installed.
    • Go to Apps and Features.
    • Uninstall Generative Design for Revit.
    • Try to install Revit/Revit LT again.


  • Remove an Invalid Drives
  • Win(Key on your Keybaord)+X.
  • Select Command Prompt (Admin).
  • Type “subst t: c:\temp” Select the <Enter> Key on your Keyboard.
  • Run the Microsoft Installation Trouble Shooter.

  • Select “uninstall”.
  • Uninstall all entries for Revit/Revit LT Content 2021 and  Revit/Revit LT 2021. 
  • Repeat as necessary.
  • Retry install.


  • Reinstall Original release from Autodesk Virtual Agent
  • Go to
  • Type “Download Revit 2021” Select the <Enter> Key on your Keyboard.
  • Select “Continue with AVA” option if asked.
  • Select for download “This Computer”.
  • Fill out the rest of the form as needed.
  • Use the “Browser Download” option.

Attempt the install again.

About the Author

Jeff Arbogast

Manufacturing Solution Center Team Lead<br><br>Jeff is responsible for manufacturing Technical Support for both internal staff and customers. In addition to the daily activities of the support center, he helps write for the National Support Center blog, and has written online classes for the IMAGINiT training on demand site.

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