Describes the cause and action for error messages.
Error Message(English)：
formula missing after saving
Formulas disappearing when Excel Spreadsheet - Microsoft Community
https://answers.microsoft.com/en-us/msoffice/forum/all/formulas-disappearing-when-excel-spreadsheet/・・・
Excel 2010 Drop-Down disappears when file is saved ...
https://answers.microsoft.com/en-us/msoffice/forum/all/excel-2010-drop-down-disappears-when-file-is/・・・
Excel 2010 Row numbers and data disappearing, rows still ...
https://answers.microsoft.com/en-us/office/forum/office_2010-customize/excel-2010-row-numbers-and-da・・・
Data Disappears in Excel - How to get it back - Stellar Data Recovery
https://www.stellarinfo.com/blog/data-disappears-in-excel-how-to-get-it-back/
How can I repair an Excel file where every formula changed itself ...
https://superuser.com/questions/340153/how-can-i-repair-an-excel-file-where-every-formula-changed-it・・・
Excel cells remain blank after entering formula and ...
https://superuser.com/questions/1109688/excel-cells-remain-blank-after-entering-formula-and-pressing・・・
worksheet function - Excel 2016 ...
https://superuser.com/questions/1089818/excel-2016-disappearing-in-formula
VBA macros "deleted" after closing excel file ...
https://superuser.com/questions/732099/vba-macros-deleted-after-closing-excel-file
Formula disappeared (View topic) ? Apache OpenOffice Community Forum
https://forum.openoffice.org/en/forum/viewtopic.php?f=9&t=56949