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[Hyun_Tak]

@Racel
I can download your file.
But the old posted files lost the link and I can’t retrieve them any more.
Here are sample posts with broken dyn & related revit files.

Curtain Wall Panel Family for Dynamo Selecting

Hi Keith, Your approach is interesting - Can you post the files (Revit & Dyn) so I can learn from it? Thanks, R. Chandrasekar

Rotating curtain wall panels

Hi Ritesh, Thank you for your help. However I was not able to download the package you mentioned.   When I was posting this question, I was thinking just use a generic curtain wall family . As shown in the first image, I set up an instance parameter “Angle” to drive the angle of the curtain wall panel. And then load this family into the project file. So in Dynamo, if we can assign right value to "Angle " parameter , then we can get what I expect as shown in the third image (using Elem…