Describes the cause and action for error messages.
Error Message(English)：
error message document not saved
Fix Excel 2013, Getting Error Message “Document Not Saved” - Q&A ...
http://ask.repairmsexcel.com/3/fix-excel-2013-getting-error-message-document-not-saved
Document Not Saved Error in Excel - Stack Overflow
https://stackoverflow.com/a/4337970
Excel 2007 Save as PDF Document Not Saved | Microsoft Excel ...
https://www.scribd.com/document/358630240/Excel-2007-Save-as-PDF-Document-Not-Saved
Excel Error Messages - Peltier Tech Blog
https://peltiertech.com/excel-error-messages/
"document not saved" - Excel 2k | Tech Support Guy
https://forums.techguy.org/threads/document-not-saved-excel-2k.403067/
Backup your files, always take backups - David McRitchie - MVPS.org
http://dmcritchie.mvps.org/excel/backup.htm
ma46118 - osp-f/qodopen-t/qodvnops-msgcpf8a80 qdls smb2 - IBM
http://www-01.ibm.com/support/docview.wss?uid=nas2MA46118
Excel 2000 articles, fixes and updates - letter X - kbupdate.info
http://kbupdate.info/excel-2000-x.php
Excel 2000 articles, fixes and updates - November 2013 - kbupdate.info
http://kbupdate.info/excel-2000-2013-11.php