Grasshopper returns null values for window width parameter

Hi all,

I’m hoping to access the built-in instance parameter Width for the windows in my Revit file. I plugged the element into the Element Parameter component and connected the Width parameter, but it returns a null value. I plugged the element into the Inspect Element component instead, and no Dimension data is displayed at all when I click into ‘All Parameters’.

I remember this working before, and when I open the parameter information in Revit there is a number associated with the width of each window.

Has anyone come across this issue before? Could something be blocking Rhino.Inside from accessing this information in the Revit family, or am I doing something silly?

I’m using Rhino 8, Rhino.Inside 1.26.9083.18516 and Revit 2023. TIA!

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There could be more than one Parameter named Width.

This was my initial suspicion so I checked this earlier - there are indeed two (familyWidthParam and curtainWallPanelsWidth), but both return null. There is no other parameter available in the list that contains the word width:

Are you sure its an instance parameter? I don’t see Width on the Inspect Element component