Installing Revit 2018 and running Dynamo?

Are you running Dynamo 1.2.3, or later and planning to install Revit 2018? If you are, then there are a few things you need to know before installing Revit 2018.

The first is that Dynamo and Revit have different development cycles. Dynamo's smaller codebase allows for faster changes and potentially more frequent releases. This means that the current version of Dynamo may not be the one that ships with Revit, as is the case with Revit 2018. Revit 2018 was released in April with the then current Dynamo 1.2.2. However, since then there have been 3 updates to Dynamo, 1.3.0, 1.3.1, and Dynamo 1.3.2.

Additionally, Dynamo installers will not replace a newer version with an older version. This can lead to conflicts after the installation as described below.

Dynamo 1.0 through 1.2.1

If you are running Dynamo 1.0 through 1.2.1, installing Revit 2018 will upgrade your Dynamo installation to 1.2.2. As always, you'll want to test any Dynamo upgrades with your current scripts before rolling an upgrade to a company.

Dynamo 1.3.0 or later

If you are running 1.3.0 or later, there are 2 choices:

Choice 1 (Recommend)

Uninstall Dynamo before installing Revit 2018, and then re-install after Revit 2018 installation. This will also mean that you need to redistribute any customization files required.

Choice 2

Install Revit 2018 without uninstalling Dynamo. Once the install is complete there will be an error message similar to the image below. Review the installation log file to ensure that the only installation error was with the Dynamo installer.

To make Dynamo 1.3.0 or later available in Revit 2018, go to "C:\Program Files\Dynamo\Dynamo Revit\1.3" and run "DynamoAddInGenerator.exe". This will pop up a command prompt for a brief period of time. Now Dynamo 1.3.0 or later will be available in Revit 2018.