Bug 204229 [Automation][Regression]Exception is thrown when preview reportdesign in webviewer
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/document/RowSaveUtil.java
}
			int rowBytes = this.version >= VersionManager.VERSION_2_2_1_3
					? this.initSave( map ) : this.saveExprValue( map );
			IOUtil.writeInt( this.rowExprsDos, rowBytes );
		}
		catch ( IOException e )
		{
			throw new DataException( ResourceConstants.RD_SAVE_ERROR, e );
		}
	}
	
	/**
	 * @param lastRowIndex
	 * @param currIndex
	 * @throws IOException
	 */
	private void saveNullRowsBetween( int lastRowIndex, int currIndex )
			throws IOException
	{
		int gapRows = currIndex - lastRowIndex - 1;
		for ( int i = 0; i < gapRows; i++ )
		{
			IOUtil.writeInt( this.rowExprsDos, 0 );
			IOUtil.writeLong( this.rowLenDos, currentOffset );
			currentOffset += IOUtil.INT_LENGTH;
		}
	}
	
}