Bug 118592 Report error
please see attached design file.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ResultIterator.java
private void checkStarted( ) throws DataException
	{
		if ( !started )
		{
			DataException e = new DataException( ResourceConstants.RESULT_CLOSED );
			logger.logp( Level.FINE,
					ResultIterator.class.getName( ),
					"checkStarted",
					"ResultIterator has been closed.",
					e );
			throw e;
		}
	}
	/**
	 * Returns the QueryResults of this result iterator. A convenience method
	 * for the API consumer.
	 * 
	 * @return The QueryResults that contains this result iterator.
	 */
	public IQueryResults getQueryResults( )
	{
		return queryResults;
	}
	/**
	 * Moves down one element from its current position of the iterator. This
	 * method applies to a result whose ReportQuery is defined to use detail or
	 * group rows.
	 * 
	 * @return true if next element exists and has not reached the limit on the
	 *         maximum number of rows that can be accessed.