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[DaveP]

@awilliams

Typically rerunning a graph with new inputs will “undo” the actions of running the graph the previous time, but it could depend on how your graph is set up so a screenshot of your graph will provide more insight.

I really hate how that works. Makes it tough to debug multiple runs if I have to keep closing and re-opening.
And the fact that it DOESN’T behave like that in the Player feels inconsistent to me.
I had a similar discussion here, but I thought that was just limited to Family.Instance

FamilyInstance.ByPoint overwrites

I’m writing a graph to lay out seating along a curve. Without getting into too much detail, I select an element and use Curve.PointAtParameter to divide it up. Then I use FamilyInstance.ByPoint to place chairs along the curve. The weird thing is that if I run the graph a second time using a different curve, Dynamo deletes the first run families and places only the families from the second run. Even if I close Revit completely, re-Open the project and re-run the Graph, it moves the Instances …