For alignment station offset labels there is a condition where Autodesk® AutoCAD® Civil 3D® isn't able to produce a valid station value.
This occurs when a perpendicular line cannot be solved for between the point being labeled and the alignment. This command fills this gap by providing an AutoCAD® multileader to fill in the Station Ahead and Station Behind values along with the angle of the bend, rounded to a whole degree.
The command uses the default multileader style. Objects able to be labelled include Alignments, Polylines, 3DPolylines, and Feature Lines.