Bug 317267 [Automation][Regression]Error is thrown out when preview gantt type chart
chart/org.eclipse.birt.chart.engine.extension/src/org/eclipse/birt/chart/extension/datafeed/GanttDataSetProcessorImpl.java
}
					else if ( cala[j] != null )
					{
						calMax = cala[j];
					}
				}
			}
		}
		return calMax;
	}
	/**
	 * This method takes the data in String form and populates the DataSet
	 * (creating one if necessary). For the GanttDataElement, the data should be
	 * provided in the form: 'S <start date> E <end date> <row label>, S <next
	 * start date> E...' i.e. 'S' and 'E' are used to designate a value as
	 * either the start or end date component of the data element. DataElements
	 * should be separated by commas (,). Components within the data element are
	 * separated by a space and their sequence is not important.
	 * 
	 * @return DataSet populated by the entries in the String or null if the
	 *         String is null.
	 * @throws ChartException
	 *             if there is any problem parsing the String passed in.
	 * @see org.eclipse.birt.chart.datafeed.IDataSetProcessor#fromString(java.lang.String,
	 *      org.eclipse.birt.chart.model.data.DataSet)
	 */
	public final DataSet fromString( String sDataSetRepresentation, DataSet ds )
			throws ChartException
	{