A face of a joined (i.e. one cuts another) mass could not be split into interior and exterior faces. Remove the cut to resolve.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)
Syntax
C#
public static FailureDefinitionId FaceSplitFailed { get; }