Dimensioning Radius in Layout Space

Is there some trick to it? Doesn’t seem to be working as I expect.

I wonder how you are doing this:

The _DimRadius command only works on curves though. If you are trying it with a VisualARQ wall for example, you can first extract the curve with the vaWallExtractPath command (or by exploding the wall, and duplicating an edge of the wall bottom) and measure the radius from that curve.