I'm having trouble creating a model at a grid intersection

Revit
,
1

I calculated grid intersections and created models at the intersections of the grids I selected.

However, the problem is that when I select a new grid, the previously created models disappear.

What I want is for the existing models to be preserved, while a new model is created whenever a new intersection is found.

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2

This is Element Binding.

TLDR remove the bindings and run the graph via player not by Dynamo core.

3

Thanks to you, I solved it. Thank you.