DO NOT REPLY [Bug 16362] New: - Can't open xls file if number of merged regions exceeds certain limit

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=16362

Can't open xls file if number of merged regions exceeds certain limit

           Summary: Can't open xls file if number of merged regions exceeds
                    certain limit
           Product: POI
           Version: 1.5.1
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: HSSF
        AssignedTo: poi-dev@jakarta.apache.org
        ReportedBy: pdavidson@emery-waterhouse.com


I'm trying to construct an xls file with plenty of merged cells, about 5 
separate groups of merged cells per row.  This works fine until the number of 
rows exceeds about 1000.  When I try to open the file in MS-Excel 2000, I get 
a message saying: " Unable to open file", and then refuses to open the file.  
Has anybody out there experienced anything similar, and possibly found a 
solution?

I'm using the latest release version of POI, in jakarta-poi-1.5.1-final-
20020615.jar.  To add the merged cells, I'm creating a new 
org.apache.poi.hssf.util.Region object and adding that to the HSSFSheet 
instance using the addMergedRegion method, eg

      Region region = new Region(rowNum, colFrom, rowNum, colTo);
      m_Sheet.addMergedRegion(region);


JDK version: j2sdk1.4.1_01
OS: Windows XP 5.1, build 2600.xpsp 1.020828-1920: service pack 1.