Element set parameter node help please

Revit
1

I thought the hard part was filtering the wall types I want, but it seem that the hardest part is the end stretch.

Can someone please help me interpret the error I am getting:
How do I provide an Element from my list of wall types to the node?

What I want to do is: Go into a model, and select all walls type instances that meet a criteria and change a parameter - this is a QC measure because the designers forget to do it.

The filtered list seems to be the 4 instances in the OTB revit arch sample file.
Thanks in advance,

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2

You are inserting a string of Family.Name

You have to insert a Element

Plug all elements of category in to List filter by bool mask

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3

This means that the whole graph to select certain items it not adequate for this task isn’t it.
is there a way to get the elements that correspond to those instances? I think if I plug that new list in it will work, but I am having a hard time doing that.