This has nothing to do with OpenOffice. Just open all the files in question with LibreOffice.
[Spreadsheet] → [Registered database document] → [Serial letter]
- Make sure that the spreadsheet with the address data exists.
- Open both of your database documents with LibreOffice.
I guess thatenvelopeMaillist.odbis the old one which lost the path to the spreadsheet and thatNew Database mail 25.odbis the new one which is connected to the spreadsheet (shows tables with data). Have a look at the status bars of both windows. There you see the difference. The old one might point to a non-existing file. The new one might point to your spreadsheet. This is the status bar of a database window with a spreadsheet connection on my Linux laptop:
- You may repair the old database document by calling menu:Edit>Database>Properties… You get a dialog with a [Browse…] button. Click it and point to your spreadsheet.
- You may also continue with the new database document if it shows the correct data in the tables section.
- No matter which of the 2 database documents you want to use, the repaired old one or the new one, call the registration dialog for databases and add a working database document by clicking the [New…] button. The button shows the following dialog:

Browse to your database document and make sure thatenvelopeMaillistis the registered Name. - Now your data source window above the serial letter shows
envelopeMaillistwith some table(s), and when you click the table, the contained data are shown in the right pane of the data source window.
Your serial letter show be able to pull the right column data from the right table in the right data source. IF NOT, call Writer-menu:Edit>Exchange Database… and choose the right table within the right data source.




