Hello all,
Can anybody explain why I get null for this graph?
I am trying to get the dimension between opposite faces of a rectangular column.
I have made sure that I select the opposite faces as both are parallel to X-axis.
I tried many nodes that create dimensions but I still cannot make any.
Please read the error message carefully 
It seems that this node also needs revit elements and not element references
Can you try it with my family? I strongly think the problem is in the family itself!
M_Concrete-Rectangular-Column.rfa (360 KB)
Edit your family and name your reference planes.
It will be easier to find the right references.
I have found the problem. I want to collect all the references in the family to be filtered afterward. I collect them with the node (Element Surfaces References) but It seems that it does not collect them properly. Do you know any node that calls all the references in a family instead of calling them with their names?