Bug 118738 can't preview meter chart with grouping
Try to preview the following report with a meter chart group on the Y series, it fails. It used to work before, this is a regression. An exception is thrown org.eclipse.birt.chart.exception.ChartException: Can not plot meter series with null or non-numeric datapoint. at org.eclipse.birt.chart.render.DialRenderer.<init>(DialRenderer.java:132) at org.eclipse.birt.chart.render.Dial.compute(Dial.java:98) at org.eclipse.birt.chart.factory.Generator.build(Generator.java:759)
chart/org.eclipse.birt.chart.device.extension/src/org/eclipse/birt/chart/device/image/JavaxImageIOWriter.java
if ( sWrappedException.equals( sException ) )
		{
			sWrappedException = null;
		}
		String sMessage = cexp.getMessage( );
		StackTraceElement[] stea = cexp.getStackTrace( );
		Dimension d = new Dimension( (int) _bo.getWidth( ),
				(int) _bo.getHeight( ) );
		Font fo = new Font( "Monospaced", Font.BOLD, 14 ); 
		_g2d.setFont( fo );
		FontMetrics fm = _g2d.getFontMetrics( );
		_g2d.setColor( Color.WHITE );
		_g2d.fillRect( 20, 20, d.width - 40, d.height - 40 );
		_g2d.setColor( Color.BLACK );
		_g2d.drawRect( 20, 20, d.width - 40, d.height - 40 );
		_g2d.setClip( 20, 20, d.width - 40, d.height - 40 );
		int x = 25, y = 20 + fm.getHeight( );
		_g2d.drawString( Messages.getString( "exception.caption", getLocale( ) ), x, y ); 
		x += fm.stringWidth( Messages.getString( "exception.caption",
				getLocale( ) ) ) + 5;
		_g2d.setColor( Color.RED );
		_g2d.drawString( sException, x, y );
		x = 25;
		y += fm.getHeight( );
		if ( sWrappedException != null )
		{
			_g2d.setColor( Color.BLACK );
			_g2d.drawString( Messages.getString( "wrapped.caption", getLocale( ) ), x, y ); 
			x += fm.stringWidth( Messages.getString( "wrapped.caption",
					getLocale( ) ) ) + 5;