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
{
					oValue = dsiData.next( );
					cValue = (Calendar) oValue;
					if ( caMin == null )
					{
						caMin = cValue;
					}
					if ( caMax == null )
					{
						caMax = cValue;
					}
					if ( cValue == null ) 
					{
						continue;
					}
					if ( cValue.before( caMin ) )
						caMin = cValue;
					else if ( cValue.after( caMax ) )
						caMax = cValue;
				}
				return new Object[]{
						new CDateTime( caMin ), new CDateTime( caMax )
				};
			}
		}
		catch ( ClassCastException ex )
		{
			throw new ChartException( ChartEnginePlugin.ID,
					ChartException.GENERATION,
					"exception.invalid.axis.data.type",