I am trying to do some comparison to find out what it is about POI 3.5 beta that is causing it to create invalid xlsx files. I am having a difficult time because when I try to zip a file after unzipping it, the excel 2007 parser can no longer read it, even if I make no changes to the files. Any idea what I am doing wrong?
Here are the steps I take. 1. Create new file with excel and save as a xlsx. 2. Rename to .zip extension 3. Right click file and select "extract to ...." 4. Delete .zip file 5. Right click on extracted folder and select "Add to xxx.zip" 6. Rename .zip file to .xlsx 7. Try unsuccessfully to open with excel. I get the following messages: 1. "Excel found unreadable content in "xxx.xlsx". Do you want to recover the contents of this workbook?" 2. After clicking "Yes", I get "Excel cannot open the file'xxx.xlsx' because the file format or extension is not valid" Any Ideas how I can recreate a xlsx file after unzipping it? Paul Dobson
