Bug 188336 Fairly Simple Report Generates NPE When Saving as Excel
When attempting to Save the attached report to Excel, the following error is displayed in the viewer instead of the Excel file: + org.eclipse.birt.report.service.api.ReportServiceException: Error happened while running the report; nested exception is: java.util.EmptyStackException
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/ExcelEmitter.java
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		addData( image.getGenerateBy( ), image.getComputedStyle( ), null, EMPTY );
	}
	public void startLabel( ILabelContent label )
	{
		
		Object design = label.getGenerateBy( );
		IContent container = label;
		while ( design == null )
		{
			container = (IContent) container.getParent( );
			design = ( (IContent) container ).getGenerateBy( );
		}
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		addData( design, label.getComputedStyle( ), url, label.getText( ) );		
	}
	public void startList( IListContent list )
	{
		startCase( list );
	}
	public void startListBand( IListBandContent listBand )
	{
	}
	public void startListGroup( IListGroupContent group )
	{