Converting Dynamo output to curves

[Kulkul]

You can split circles and create detail lines. You can’t directly use circles. Similar topic is discussed here:

A problem with creating floor element by circular curve with dynamo

You can’t use directly circle to create wall even in Revit when you create a wall in Revit using a circle, it actually creates 2 half-circles. If you split your circle from the midpoint, it works: [WallCircular]