You cannot copy a displacement set into a view if one or several of its elements already belong to another displacement set.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.2.0.0 (26.2.0.0)
Syntax
C#
public static FailureDefinitionId ElementsAlreadyDisplacedInView { get; }