Bug 207897 [Automation][Regression]A DataException is thrown out when preview reportdesign
Description: A DataException is thrown out when preview reportdesign Test Date: 20071030 Test Build: BIRT2.2.2 v20071029 Step to reproduce: 1. Use the reportdesign attached 2. Preview it Expect result: Report can be previewed without any exception. Actual result: A DataException is thrown out.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
*/
	private TimeZone timeZone;
	
	/**
	 * report document, may be the output or input.
	 */
	private IReportDocument reportDoc;
	/**
	 * the created report content
	 */
	private IReportContent reportContent;
	/**
	 * the current executed design.
	 */
	private ReportItemDesign design;
	/**
	 * The current content element to be executed or loaded
	 */
	private IContent content;
	
	/**
	 * the current opened result set 
	 */
	private IBaseResultSet[] rsets; 
	/**
	 * A stack of handle objects, with the current one on the top
	 */
	private Stack reportHandles = new Stack( );
	/**
	 * total page