Bug 214197 [Regression] Auto scale does not work correctly [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/AutoScale.java
}
		}
		if ( oStepNumber != null )
		{
			sc.oStepNumber = oStepNumber;
			sc.bStepFixed = true;
			
			if ( sc.oStepNumber.intValue( ) < 1 )
			{
				throw new ChartException( ChartEnginePlugin.ID,
						ChartException.GENERATION,
						"exception.invalid.step.number", 
						new Object[]{
							oStepNumber
						},
						Messages.getResourceBundle( rtc.getULocale( ) ) );
			}
		}
	}
	/**
	 * Computes the default DecimalFormat pattern for axis according to axis
	 * value and scale steps.
	 * 
	 * @param dAxisValue
	 *            axis value
	 * @param dAxisStep
	 *            scale step
	 * @return default format pattern
	 */
	public final DecimalFormat computeDecimalFormat( double dAxisValue,