Can't make change to Group "[Type Name]" with more than one instance. To resolve: Ungroup and Group again under a new name.
Edit and make change, then change all instances of the original Group to the new Group.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.2.0.0 (26.2.0.0)
Syntax
C#
public static FailureDefinitionId GroupPropagationFailedUngroup { get; }