by RoryOF » Sat Mar 25, 2017 10:11 pm
Your file is badly damaged, probably beyond useful repair.
As soon as possible do the following:
Download Recuva or PhotoRec (only one needed) and let it do an indepth recovery of deleted files on your computer. You may get a file containing some or all of your data (or not). Do this as a first priority; other use of the computer may overwrite any existing but deleted files and prevent their recovery. There is no guarantee that you will recover anything useful.
Do the above soonest! Do not wait for anything else - there is little prospect of recovering anything from your file, so do this NOW!
Apache OpenOffice 4.1.8 on Xubuntu 20.04.1 (mostly 64 bit version) and very infrequently on Win2K/XP