Set values across multiple nested elements

Revit
1

Hi everyone,

I’m working on a script that transfers parameters from a main family to its nested families (specifically lintels). I’ve hit a roadblock when it comes to handling list levels and structuring the data correctly.

The goal of the script is to:

  1. Retrieve values from the main family.
  2. Gather all nested families (in this case, lintels) from the main family.
  3. Assign multiple (7) parameters to the nested families in one go.

The issue I’m facing is at the final stage, where I’m struggling to properly set up the list levels for the operation. I’ve attached a screenshot of the last part of the script, and I’ve tried the following configurations, which I thought should work but haven’t given me the desired results:

  • Elements: @@L1 — Elements: @@L2
  • Parameter
  • Names: @L2 — ParameterNames: @L2
  • Values: @L2 — Values: @L2

Lintels
Lintels1114×802 124 KB

If anyone has suggestions on how to properly structure the list levels or rewrite this final section of the script, I’d greatly appreciate your input!

P.S.
This is the current workaround, but I’m not entirely satisfied with it. I am using the
list Of Repeated Items.

Best regards,
GD

2

This is correct.

When in doubt, match all list lengths. List levels are quick and convenient, but they won’t cover every single list structure and input mapping scenario you can have. If things aren’t working, just duplicate values until everything matches and all your inputs have the same number of inputs (no list levels needed and structure doesn’t matter as long as it all matches).