Hello.

My POI-Version: poi-bin-3.0.1-FINAL-20070705.zip

I've generated XLS-File with:

		try {
			HSSFWorkbook wb = new HSSFWorkbook();
			HSSFCellStyle styleDate = wb.createCellStyle();
			styleDate.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy"));

			if (result != null) {
				// create a new sheet
				HSSFSheet s = wb.createSheet();

				// declare a row object reference
				HSSFRow r = null;

				// declare a cell object reference
				HSSFCell c = null;

				wb.setSheetName(0, "RemovalInstallationList");

				// first row with headings
				r = s.createRow(0);

				c = r.createCell((short) 0);
				c.setCellValue(new HSSFRichTextString("Three Letter Code"));
			
				....

				c = r.createCell((short) 37);
				c.setCellValue(new HSSFRichTextString("Description"));
				
				s.setColumnWidth((short) (0), (short) ((50 * 4) / ((double) 1 / 20)));
			
				....

				s.setColumnWidth((short) (37), (short) ((50 * 4) / ((double) 1 / 20)));
				
				Iterator it = result.iterator();
				for (int i = 0; it.hasNext(); i++) {
					RemovalInstallationReportResultRowModel resultModel = null;
					resultModel = (RemovalInstallationReportResultRowModel) it.next();

					// create a row with data
					r = s.createRow(i + 1);

					c = r.createCell((short) 0);
					if (resultModel.getThreeLC() != null) {
						c.setCellValue(new HSSFRichTextString(resultModel.getThreeLC()));
					} else {
						c.setCellValue(new HSSFRichTextString(""));
					}
			
					....

					c = r.createCell((short) 37);
					if (resultModel.getDescriptionPartNoInstalledComponent() != null) {
						c.setCellValue(new
HSSFRichTextString(resultModel.getDescriptionPartNoInstalledComponent()));
					} else {
						c.setCellValue(new HSSFRichTextString(""));
					}
				}
				return new RemovalInstallationReportCSVModel(Status.OK, wb.getBytes());
			}
			
			calling method:
			
			byte[] resultAsByte = csvModel.getTransferObject();
			if (result != null) {
			inputStream = new ByteArrayInputStream(resultAsByte);
		}
		input();
		return "exportCSV";		


    Struts-Config.xml

		<result name="exportCSV" type="stream">
			  <param name="contentType">application/vnd.ms-excel</param>
			  <param name="inputName">inputStream</param>
			  <param name="contentDisposition">filename="document.xls"</param>
		</result>
		
		The result is a message from Excel during opening the file like:
		
		Microsoft Excel Datei-Reparatur Protokoll

		In Datei 'D:\tmp\exported_file_damaged_231107.xls' wurden Fehler festgestellt
		Die folgenden Reparaturen wurden durchgeführt:
		Die Zusammenfassungs-Information des Dokumentes ist verloren gegangen.

The resulting exported file is attached.

Kind regards.