The idea is to mimic a calculated value in a sublist as in Revit schedules. How would I pull two values from a sublist, calculate something, and add that new value to the sublist? Example: divide Area by Length in Wall parameters. So far: [Capture]

I see your logic for a single list. When I run it I only get a simple list from Element.GetParameterValueByName. What am I missing now to get and process a list of lists? [2nd try]

Check the ‘lacing’ of each node in Vikram’s solution :slight_smile:

Ah, lacing solved it. Those little icons on the nodes are subtle. Very well done, guys. [solution]

Pull values from sublist, add new values to the same sublist?

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Pull values from sublist, add new values to the same sublist?

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