Thanks Again Paolo, I get rid of the error, but the result I get is “IronPytho.Runtime.Types.ReflectedProperty” I was expecting a float/double value accordint to this: http://docs.autodesk.com/CIV3D/2018/ENU/API_Reference_Guide/html/2194df7b-8d94-0be7-f2eb-9c5b7830dd78.htm