Bug 152898 Error Bar Chart
Version: 3.2.0 Build id: I20060602-1317 The option of chart sometimes works ok, but sometimes it has the following error:
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/AutoScale.java
setEndPoints( dStart, dEnd );
		setTickCordinates( da );
		baTickLabelVisible = checkTickLabelsVisibility( xs, la, iLabelLocation );
		return nTicks;
	}
	/**
	 * Returns the formatted value for given Axis type and value.
	 * 
	 * @param iType
	 * @param oValue
	 * @return
	 */
	public final String formatCategoryValue( int iType, Object oValue,
			int iDateTimeUnit )
	{
		if ( oValue == null )
		{
			return IConstants.NULL_STRING;
		}
		if ( iType == IConstants.TEXT ) 
		{
			return oValue.toString( );
		}
		else if ( iType == IConstants.DATE_TIME )
		{
			final Calendar ca = (Calendar) oValue;
			IDateFormatWrapper sdf = null;
			if ( fs == null ) 
			
			{