I got the problem fixed - it seems as if it was caused by a combination of having German umlauts in the sheet names and the JVM I was using (kaffe 1.1.5 as provided by Debian). I can successfully update my workbook with poi-2.5.1-final-20040804.jar now.
However, when trying the current CVS snapshot with Sun's JVM (build 1.5.0_05-b05) I found that version seems to choke on cell comments containing German umlauts. The following code will create a corrupted copy of the sample sheet attached: FileInputStream inFile = new FileInputStream(args[0]); POIFSFileSystem fs = new POIFSFileSystem(inFile); HSSFWorkbook wb = new HSSFWorkbook(fs); FileOutputStream outFile = new FileOutputStream(args[1]); wb.write(outFile); outFile.close(); Thanks for the efforts and work you put into making POI and HSSF as useful as they are :) Matthias
cell-comment-breaks-cvs-snapshot.xls
Description: cell-comment-breaks-cvs-snapshot.xls
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