Hi all. With current CVS (and all versions prior to now)... When a call HSSFSheet.createRow() occurs and the row exists the workbook can be corrupted. Basically the Sheet.insertRow does not remove the cells attached to the existing row. I say CAN corrupt because sometimes excel seems to silently fix the problem, in other cases it goes berzerk! Jason
Sorry I meant Sheet.addRow
Created attachment 4928 [details] Corruption patch. Apply ASAP
Applied. Would prefer unified diffs in the future (-u). Please cross check.