Bug 178489 [Deployment]Error log isn't printed in log file when using framset set method[0601]
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/RenderTask.java
{
				log
						.log(
								Level.SEVERE,
								"An error happened while running the report. Cause:", ex ); 
				throw new EngineException(
						"Error happened while running the report", ex ); 
			}
			catch ( OutOfMemoryError err )
			{
				log
						.log( Level.SEVERE,
								"An OutOfMemory error happened while running the report." ); 
				throw err;
			}
		}
		protected boolean allowPageBreak( )
		{
			return false;
		}
		
		protected abstract IReportExecutor createReader( );
		
		protected abstract void load( ReportContentLoader loader,
				IContentEmitter emitter );
	}
	/**
	 * Renders a page with a page number. 
	 */
	private class PageRender extends InnerRender