Bug 135790 ClassCastException in RowData.
ClassCastException is thrown in RowData line 81(IBaseExpression expr = ( IBaseExpression ) valueExpressions.get( index - 1 );).
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/parser/EngineIRVisitor.java
{
			width = new DimensionType( effectWidth.getMeasure( ), effectWidth
					.getUnits( ) );
		}
		if ( effectHeight != null )
		{
			height = new DimensionType( effectHeight.getMeasure( ),
					effectHeight.getUnits( ) );
		}
		page.setPageSize( width, height );
		page.setOrientation( handle.getOrientation( ) );
		
		DimensionType top = createDimension( handle.getTopMargin( ) );
		DimensionType left = createDimension( handle.getLeftMargin( ) );
		DimensionType bottom = createDimension( handle.getBottomMargin( ) );
		DimensionType right = createDimension( handle.getRightMargin( ) );
		page.setMargin( top, left, bottom, right );
	}
	protected void visitDesignElement( DesignElementHandle obj )
	{
		
		currentElement = null;
	}
	public void visitGraphicMasterPage( GraphicMasterPageHandle handle )
	{
		GraphicMasterPageDesign page = new GraphicMasterPageDesign( );
		setupMasterPage( page, handle );
		
		page.setColumns( handle.getColumnCount( ) );
		DimensionType spacing = createDimension( handle.getColumnSpacing( ) );