Here the failure description:

- Create an Excel cell
- Append a hyperlink to the Excel cell.

Example:
HSSFSheet sheet = wb.getSheet("Hyperlinks");
HSSFRow hssfRow = sheet.createRow(20);
HSSFCell cell = hssfRow.createCell(1);
cell.setCellValue("Zelle B21");

link.setAddress("excelTest.xls.orig.xls");
link.setLabel("ZelleA11");
link.setTextMark("ZelleA11");

cell.setHyperlink(link);

- If you perform a system output of the cell hyperlink values they are are available for this cell.

- Store the workbook to a new excel file.
- Open this file via Excel
- The hyperlink is broken. The textmark is NOT available for the cell.

if you read the new file vio POI you get the following values for this cell:

cell.getStringCellValue(): Zelle B21
Address: excelTest.xls.orig.xls
Label: file
ShortFilename: excelTest.xls.orig.xls
Hyperlink Type: 0
TextMark: null

If you need more information please let me know.