Thank you for the reply @Elie.Trad ,
I am trying to use Revit API to rotate the structural column. I see you used Revit Nodes.
As for @sovitek 's advice: I get False when checking the property of the structural column family instance:
# el
el = UnwrapElement(IN[0])
OUT = el.CanRotate # returns 'False'
It guess it has to be a bug with the Dynamo ‘RevitServices.Transactions.TransactionManager’ namespace?