Can't change Group"[Name]" with more than one instance because it has a Sketch-based element. Edit the Sketch of the element instead.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.4.0.0 (26.4.0.0)
Syntax
C#
public static FailureDefinitionId GroupPropagationFailedSketch { get; }