 When the locomotives and rolling stock were ordered, however, there was an error – possibly confusion between the Swedish fot and the English foot, which differ by about 2.7%, or more likely because Köping–Uttersbergs järnvägsaktiebolag assumed the gauge was measured from the centre of the rail to the centre of the rail.It was only when the rolling stock was delivered that the error was noticed.It was decided that moving one rail outwards on the half-built railway would be cheaper than re-gauging the vehicles.