Bug 213810 [2.2.2 acceptance] Error occurs when create a third axis.
description: Error occurs when create a third axis. build version: 2.2.2 v20071224-1008 steps to reproduce: 1. New a report. 2. New a datasource with sample DB and new a dataset with table payments. 3. New bar chart. 4. On Select Chart Type page, select Multi-Y Axis as More Axes. 5. On Select Data page, bind the dataset, select customernumber as Series1 of Axis1, create a secondary Axis, select PAYMENTDATE as Series1 of Axis2, create a third Axis. Expected result: The third Axis should be created correctly. Actual result: Error occurs: Unable to use a non-datetime data to render a datetime axis.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
if ( ( dsi[iSeriesIndex].getDataType( ) & IConstants.NUMERICAL ) != IConstants.NUMERICAL )
							{
								throw new ChartException( ChartEnginePlugin.ID,
										ChartException.DATA_SET,
										"exception.percent.stacked.non.numerical",  
										Messages.getResourceBundle( rtc.getULocale( ) ) );
							}
						}
						
						iDataSetCount = dsi[iSeriesIndex].size( );
						final AxisSubUnit au = ssl.getSubUnit( sg, k );
						for ( int j = 0; j < iSeriesPerGroup; j++ )
						{
							se = (Series) alSeriesPerGroup.get( j );
							if ( j > 0 ) 
							{
								if ( dsi[iSeriesIndex] == null )
								{
									ds = se.getDataSet( ); 
									dsi[iSeriesIndex] = new DataSetIterator( ds );
									
									dsi[iSeriesIndex].reverse( cwa.isReverseCategory( ) );
									
									if ( ( dsi[iSeriesIndex].getDataType( ) & IConstants.NUMERICAL ) != IConstants.NUMERICAL )
									{
										throw new ChartException( ChartEnginePlugin.ID,
												ChartException.DATA_SET,
												"exception.percent.stacked.non.numerical",  
												Messages.getResourceBundle( rtc.getULocale( ) ) );