Bug 312761 It makes no difference changing the series labels position in Radar chart.[13]
chart/org.eclipse.birt.chart.ui/src/org/eclipse/birt/chart/ui/util/ChartUIUtil.java
} );
		}
		String yGroupWarning = checkGroupTypeOnYGrouping( context, chart );
		if ( yGroupWarning.length( ) != 0 )
		{
			yGroupWarning = Messages.getString( "TaskSelectData.Warning.YGroupTypeCheck", 
					new String[]{
						yGroupWarning
					} );
		}
		if ( cGroupWarning.length( ) != 0 || yGroupWarning.length( ) != 0 )
		{
			ChartWizard.showException( ChartWizard.ChartUIUtil_cGType_ID,
					cGroupWarning + yGroupWarning );
		}
		else
		{
			ChartWizard.removeException( ChartWizard.ChartUIUtil_cGType_ID );
		}
	}
	/**
	 * Check if default aggregation and value series aggregation are valid for
	 * Gantt chart and show warning message in UI.
	 * 
	 * @param context
	 * @since 2.3
	 */
	public static boolean checkAggregateType( ChartWizardContext context )
	{
		boolean isValid = true;