Not able to GroupByKey

Hi All,
I am trying to Group my list as per my Floor Name, it’s not working.
Can anyone help me with it.


The list you are grouping by has to be the same length. You need to use an Element.GetParameterByName node and pull the identifier you are looking for from the actual element. If you do a quick search you’ll find some references.

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Also, the element you group by has to be comparable. Get the element ID or name from the view before you group it.