https://bz.apache.org/bugzilla/show_bug.cgi?id=66590
--- Comment #2 from Nick Burch <apa...@gagravarr.org> --- The code to work with the file header is: https://github.com/apache/poi/blob/trunk/poi/src/main/java/org/apache/poi/poifs/storage/HeaderBlock.java And the offsets are defined in: https://github.com/apache/poi/blob/trunk/poi/src/main/java/org/apache/poi/poifs/storage/HeaderBlockConstants.java For most of the things tracked we have a start and a count, but for properties we only have the count The documentation for the header is: https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-cfb/05060311-bfce-4b12-874d-71fd4ce63aea As PJ Fanning says, we don't have any MSI support, and no unit tests for it. If you want to work on this, we'll need test MSI files to go with the unit tests for the fix. As well as updating the header code to read/store the additional value, you'll also need to update other bits of POIFS code to tell the header of the new count. Good luck! -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@poi.apache.org For additional commands, e-mail: dev-h...@poi.apache.org