Bug 16381

Hi,
I m using poi1.8-dev and my java version is 1.1.3_04.

I m using poi to read and append to mid size excel
files(around 2 MB) containing several sheets.
After around 30th row it returns a null through I can see in the file that the
row is populated.
The running code which i use is below. I m attaching the XL file as well.
Thanx
Amitabh
--------------------------------------------------------------------------
import java.io.*;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import java.util.Vector;
import java.util.Iterator; 

public class SkuReadTest18
{

    public SkuReadTest18()
    {
    }

    public static void main(String args[])
       throws IOException
     {
       POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream("C:\\tc30
\\tstlocdir\\TestExcel.xls"));
       HSSFWorkbook wb = new HSSFWorkbook(fs);
       HSSFSheet sheet;
       HSSFRow row;
       HSSFRow r;
       HSSFCell cell;
       HSSFCell cell1;
       HSSFCell parcell;
       String xxx;
       int j=0;
       int i;
       int celltype,k ;
       String yyy;
       int shtno = wb.getNumberOfSheets();
       Vector vec = new Vector(500);
       System.out.println("The number of sheets is " + shtno);
       for ( i = 0; i <shtno; i++)
        {
        
        try {
             sheet = wb.getSheetAt(i);
             row = sheet.getRow(2);
             cell = row.getCell((short)0);
             celltype = cell.getCellType();
             System.out.println("cell type is " + celltype);
             if (celltype==1)
             {
                 xxx = cell.getStringCellValue().toString();
                 System.out.println("The Parent value is "+ xxx);
                 cell1 =null;
                 if (xxx.equals("PARENT_PART_NUM"))
            	  {
            		Iterator rows = sheet.rowIterator();
            		r = (HSSFRow)rows.next();                        
            		while(r.getRowNum()<3)
                  		r = (HSSFRow)rows.next();
                        j=3;
            		while(rows.hasNext())
            		{     
            			r = (HSSFRow)rows.next();	    
            			cell1 = r.getCell((short)0);
        			               
        	   		if (cell1!=null)         	   
        	   		{
        				yyy = cell1.getStringCellValue();
        				System.out.println("yyy at j =" +j 
+ "is .."+ yyy);
        	        		if (yyy.length()>0)
        	        		{
        		    		if(!vec.contains(yyy))
        		    		     vec.add(yyy);
        				}	
        	    		}
        	    	        j++;
			}
	     	}
	} 
	}catch (Exception e)
    	{
    		e.printStackTrace();
    	}//else continue;

	System.out.println("The Vector is "+vec.size());
    } 
    
}
}