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
public void setHandle( DesignElementHandle handle )
	{
		this.handle = handle;
	}
	public void executeSetSimplePropertyCommand( DesignElementHandle eih,
			String propName, Object oldValue, Object newValue )
	{
		if ( handle == null )
		{
			return;
		}
		IElementCommand command = new ChartSimplePropertyCommandImpl( eih,
				this,
				propName,
				newValue,
				oldValue );
		this.handle.getModuleHandle( ).getCommandStack( ).execute( command );
	}
	/**
	 * Set the new chart through a command for command stack integration
	 */
	public void executeSetModelCommand( ExtendedItemHandle eih, Chart oldChart,
			Chart newChart )
	{
		if ( handle == null )
		{
			return;
		}
		IElementCommand command = new ChartElementCommandImpl( eih,
				this,