Bug 152554 ReportServiceException is thrown out in PDF when preview attached design file
ReportServiceException is thrown out in PDF when preview attached design file, this exception doesn't occur in WebViewer/HTML. Error log: org.eclipse.birt.report.service.api.ReportServiceException: Error happened while running the report
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFLayoutManagerFactory.java
}
		}
		public Object visitPage( IPageContent page, Object value )
		{
			assert ( false );
			return null;
		}
		public Object visitContainer( IContainerContent container, Object value )
		{
			return visitContent( container, value );
		}
		public Object visitTable( ITableContent table, Object value )
		{
			return new PDFTableLM( context, parent, table, executor );
		}
		public Object visitTableBand( ITableBandContent tableBand, Object value )
		{
			return new PDFTableBandLM( context, parent, tableBand, 
					executor );
		}
		public Object visitRow( IRowContent row, Object value )
		{
			return new PDFRowLM( context, parent, row, executor );
		}
		public Object visitCell( ICellContent cell, Object value )
		{
			return new PDFCellLM( context, parent, cell, executor );
		}
		public Object visitText( ITextContent text, Object value )
		{