Revit 2019 typically runs best with Dynamo 2.0.x .
When Autodesk released Revit 2019, they bundled Dynamo as a core component, not just an optional add-in. The default version shipped with Revit 2019 was (specifically 1.3.3 or 1.3.4, depending on updates). dynamo for revit 2019
You have 200 parking stalls. Typing numbers manually takes 2 hours. The Solution: Revit 2019 typically runs best with Dynamo 2
Let's walk through a simple example of creating a room schedule with Dynamo: dynamo for revit 2019
OUT = "Levels created"
Manually creating 100 sheets and assigning them to a scope box takes hours. A Dynamo script does it in seconds by reading a simple Excel list. Parametric Modeling