FamilyInstance is not place on face or surface

Revit
, ,
1

hi,
all

i use node springs.FamilyInstance.byFacePoints for place family on face or surface, but i don’t know what the problem for place family.

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06.JPG1179×692 43 KB

2

I think that should work

dumb question- it is a face based family- right ?

Andrew

3

yes it’s Face Based Family

4

try it without the flatten nodes- your lists are already one dimensional

20180313%20face%20family%20on%20surface
20180313 face family on surface.PNG2976×1498 363 KB

5

Thanks for reply

yes, that;s right.

but i Want select wall then i get Surface after filter of the element as INPUT(Face) of Springs.FamilyInstance.ByFacePoints.

and i get point by Solid.Centroid and then set point it’s my required that output as INPUT(Point) of Springs.FamilyInstance.ByFacePoints.

so that’s my Problem