Created attachment 204992 [details] forum-mso-en4-115879.xls: example used while developing the fix Although the file opens without complaint in LO, MS Excel indicated that it was corrupt. This started in LO 7.4.4 with commit c4d7b9c3ec6e44b96134fdfb036be7f9fcf39f9d on Fri Nov 25 14:01:09 2022 +0100 tdf#70293 XLSX export: fix lost grouping of shapes Reviewed-on: https://gerrit.libreoffice.org/c/core/+/143142 The following file were reported as bad fdo64019-1.xls: attachment 78580 [details] (Rewe-Uebungen.xls) forum-mso-de-31686.xls forum-mso-de-32724.xls forum-mso-en4-126655.xls forum-mso-en4-126663.xls forum-mso-en4-152393.xls forum-mso-en4-158469.xls forum-mso-en4-158500.xls forum-mso-en4-162817.xls forum-mso-en4-163374.xls forum-mso-en4-209198.xls forum-mso-en4-209741.xls forum-mso-en4-21261.xls forum-mso-en4-22431.xls forum-mso-en4-225546.xls forum-mso-en4-24974.xls forum-mso-en4-31707.xls forum-mso-en4-32103.xls forum-mso-en4-32121.xls forum-mso-en4-33289.xls forum-mso-en4-388151.xls forum-mso-en4-397195.xls forum-mso-en4-397949.xls forum-mso-en4-71001.xls ooo116418-1.xls Steps to reproduce: 1- open Rewe-Uebungen.xls in LO and save is as a .xlsx (Excel 2007 or 2010) 2- try to open the round-tripped file in Microsoft Excel (tested 2010, 2024)
Justin Luth committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/1efe51bb6d335064b0bdf2c55eb37b417d5af134 tdf#170285 xlsx export: don't skip groupshapes of unknown shape type It will be available in 26.8.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.