I am trying to orient the void marker families to orient to the direction of the ducts. But for some reason it is not orienting in the correct direction [image] [image] Any Idea, why this might be happening? Trial.rvt (6.5 MB) Trial.dyn (115.5 KB)

@Mohammad.Uddin2 , here is similar topic… check out [image] Polar multiple array Revit @simone.checchin , you will need a vector direction … to set the chairs. KR Andreas KR Andreas

Error: FamilyInstance.SetRotation not working properly

Revit

Draxl_Andreas August 8, 2023, 12:57pm 2

@Mohammad.Uddin2 ,

here is similar topic… check out

KR
Andreas

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Error: FamilyInstance.SetRotation not working properly

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