Bug 204224 [Regression][Compatibility] Exception is thrown out when open the attached report design made on build 2.0.0 [0901]
chart/org.eclipse.birt.chart.reportitem/src/org/eclipse/birt/chart/reportitem/ChartReportItemImpl.java
* 
	 * @see org.eclipse.birt.report.model.api.extension.ICompatibleReportItem#updateRowExpressions(java.util.Map)
	 */
	public void updateRowExpressions( Map newExpressions )
	{
		CompatibleExpressionUpdater.update( cm, newExpressions );
	}
	public org.eclipse.birt.report.model.api.simpleapi.IReportItem getSimpleElement( )
	{
		assert handle instanceof ExtendedItemHandle;
		ExtendedItemHandle eih = (ExtendedItemHandle) handle;
		try
		{
			if ( cm instanceof ChartWithAxes )
			{
				return new ChartWithAxesImpl( eih, (ChartWithAxes) cm );
			}
			if ( cm instanceof ChartWithoutAxes )
			{
				return new ChartWithoutAxesImpl( eih, (ChartWithoutAxes) cm );
			}
			return null;
		}
		catch ( Exception e )
		{
			logger.log( e );
			return null;
		}
	}
}