Created attachment 31730 [details] XLSX Example Under some circumstances, the XSSFCell constructor XSSFCell(XSSFRow row, CTCell cell) throws a null pointer exception at line 110 (release poi-src-3.10-FINAL-20140208) _cellNum = row.getCell(prevNum-1).getColumnIndex() + 1; See the attached java and xls files
Created attachment 31731 [details] Create Cell example
Fixed via r1647291, we now explicitly set the missing cell policy internally when creating new cells to avoid receiving null at this point.