A group has been changed outside group edit mode. The change is being allowed because there is only one instance of the type.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.1.0.0 (26.1.0.34)
Syntax
C#
public static FailureDefinitionId AtomViolationWhenOnePlaceInstance { get; }