Multiple instances of the same view in sheets not supported. CannotCopyMustBeUniqueViewport is deprecated in Revit 2023 and may be removed in future version of Revit. Please use ViewInAModelMustBeUnique instead.

public static FailureDefinitionId CannotCopyMustBeUniqueViewport { get; }

Public Shared ReadOnly Property CannotCopyMustBeUniqueViewport As FailureDefinitionId
	Get

public:
static property FailureDefinitionId^ CannotCopyMustBeUniqueViewport {
	FailureDefinitionId^ get ();
}