https://bz.apache.org/bugzilla/show_bug.cgi?id=62732
Bug ID: 62732 Summary: xlsx output by POI 4.0.0 cannot open because file format or extension is not valid. Product: POI Version: unspecified Hardware: PC Status: NEW Severity: critical Priority: P2 Component: XSSF Assignee: dev@poi.apache.org Reporter: peng...@gmx.de Target Milestone: --- With previous version 3.17 there is no problem with created .xlsx output. After upgrade to 4.0.0 the output .xlsx is corrupted and can not be opened anymore with the message "...file format or file extension is not valid...". Used java version is same: jdk1.8.0_172. My program uses a predefined xlsx as template, at run time this template will be populated with data from database. -- 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