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
throw new RuntimeException( new ChartException( ChartEnginePlugin.ID,
					ChartException.COMPUTATION,
					"exception.tick.computations",  
					Messages.getResourceBundle( rtc.getULocale( ) ) ) );
		}
		this.atcTickCoordinates = atc;
	}
	/**
	 * @param index
	 * @return
	 */
	public final boolean isTickLabelVisible( int index )
	{
		if ( baTickLabelVisible == null
				|| index < 0 || index > baTickLabelVisible.length - 1 )
		{
			return false;
		}
		return baTickLabelVisible[index];
	}
	/**
	 * @param index
	 * @return
	 */
	public final boolean isTickLabelStaggered( int index )
	{
		if ( baTickLabelStaggered == null
				|| index < 0 || index > baTickLabelStaggered.length - 1 )
		{
			return false;