On Thu, 2024-09-05 at 10:05 +0900, 노은석 wrote: > For your reference, the files were generated using SXSSFWorkbook
Greetings. Recommendations: 1) verify, what the linux command "file" is telling you about your file 2) verify, that your speadsheet can be opened with Gnumeric, LibreOffice, MS Excel 3) unzip your XLSX and re-zip it 4) bit wise compare your both zip files 5) try smaller file sizes 6) try non-streaming output (XSSF) If none of those investigations reveal anything interesting, then really there is only SLACK to ask. Good luck! Andreas