Error 1601 Installing Revit / Revit LT 2018

Error 1601 Installing Revit / Revit LT 2018
You are not able to install Revit (or Revit LT) 2018 due to an Error 1601 on the installation log file.


The installation is failing on the attempt to install ODBCInstallDriver64 because Windows already has ODBC driver installed.


A corrected *.msi file, to work around the problem, can be downloaded and used to replace the existing Revit (or Revit LT) 2018 install *.msi, on downloaded installers or deployments that include Revit/Revit LT 2018, doing the following:


Revit 2018


  • Clear TEMP folder, Turn Antivirus Off.
  • Then run the Revit 2018 installation again from the Setup.exe
Revit LT 2018
  • Please download the RTL.msi file from the box folder:
  • Replace the file on the folder: C:\Autodesk\Revit_LT_2018_G1_R1_Win_64bit_dlm\x64\RLT\RTL.msi
  • Clear TEMP folder, Turn Antivirus Off.
  • Then run the Revit LT 2018 installation again from the Setup.exe

To Manually Correct this issue:

1) Make a backup copy of the RVT.msi (or RTL.msi) file located here:

  • C:\Autodesk\Autodesk_Revit_2018_English_Win_64bit_dlm\x64\RVT\RVT.msi
  • C:\Autodesk\Revit_LT_2018_G1_R1_Win_64bit_dlm\x64\RLT\RTL.msi

2) Download, install and run Microsoft Orca.

3) Open the RVT.msi (or RTL.msi) file in Orca, search for ODBCDataSource & ODBCDriver and delete the keys below:
ODBCDataSource & ODBCDriver Keys
4) Save the Orca revised RVT.msi (or RTL.msi) file.

5) Clear TEMP folder, Turn Antivirus Off.

6) Run the Revit (or Revit LT) 2018 installation again.

See Also:

If you are still experiencing errors after following the steps above, please do not hesitate to contact our technical support team here!


Revit Training Courses

15 June 2022

Our Revit training courses are hosted by industry-experienced, Autodesk certified, skilled application specialists and consultants. Learn Revit and build the market's demanding skills. Enroll now!

Learn more

BIM 360 (Building Information Modeling)

15 June 2022

BIM Consultation - BIM (Building Information Modelling) 360 construction management software enables almost anytime, anywhere access to project data throughout the building construction lifecycle.

Learn more