After I use POI 3.5 beta 3 to modify cell data that is referenced by
charts on the same sheet, next time I open the file, I get: "Excel found
unreadable content in 'Dashboard.xlsx'. Do you want to recover the
contents of this workbook? If you trust the source of this workbook,
click yes."



I unzipped a copy of the original file and the same file after right
after using Xssf to modify cell values (unconverted by excel). The
modified file was missing the Following:



\xl\charts

\xl\drawings

\xl\printerSettings

\xl\worksheets\_rels

\xl\themes

\xl\calcChain.xml



Is this known or expected behavior? If not, what other info would be
helpful in tracking down the problem?



Thanks,



Paul Dobson