Dimension to nearest grid for column

Hi Guys,
I found the script for dimension for column from nearest grid. But in that Custom node got error. Some one help to find that custom node, it will be very useful.K - Dimension column V1.dyn (192.0 KB)

It seems that your custom node is missing try pasting your custom node in this location C:\Users\User Name\AppData\Roaming\Dynamo\Dynamo Revit\package name\dyf