I have a problem with poi serializer (1.5 final, 1.4JDK) i can see some difference between valid and invalid excel files. The invalid excel file was not started with 'ÐÏ' sequence... I use simple cells that contains only text and merged regions, without any style. (color,font, etc) Regards, Bendeguz
Sorry, this is my fault, I use only HSSFWorkbook.getBytes() for creating excel files, without using POIFSFileSystem... Regards, Bendeguz