Bug 212371 [Regression] Auto-scale does not work correctly and gridline is not shown anymore when run the attached java file [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/AutoScale.java
sc.bAxisLabelStaggered = ax.isAxisLabelStaggered( );
			sc.iLabelShowingInterval = ax.getLableShowingInterval( );
			sc.bTickBetweenCategories = ax.isTickBwtweenCategories( );
			sc.dZoomFactor = zoomFactor;
			sc.iMarginPercent = iMarginPercent;
			
			if ( oMinimum != null )
			{
				if ( oMinimum instanceof DateTimeDataElement )
				{
					sc.oMinimum = ( (DateTimeDataElement) oMinimum ).getValueAsCDateTime( );
				}
				else
				{
					throw new ChartException( ChartEnginePlugin.ID,
							ChartException.GENERATION,
							"exception.invalid.minimum.scale.value",  
							new Object[]{
									oMinimum,
									ax.getModelAxis( ).getType( ).getName( )
							},
							Messages.getResourceBundle( rtc.getULocale( ) ) );
				}
				sc.bMinimumFixed = true;
			}
			
			if ( oMaximum != null )
			{
				if ( oMaximum instanceof DateTimeDataElement )
				{