Thanks for eliminating that possibility.
I just thought of one more (possibility) to eliminate (or hopefully it might be a solution).
Have you checked out the possibility that the user has been saving the file using "Backup". If so, there's a "slight" possibility that the Backup file is not corrupt.
In using "Backup" (SLASH FILE SAVE ENTER BACKUP), 123 first copies the existing file to a filename with the same prefix, but with BAK as a suffix, then saves the "screen" file as the WK4 file.
To open a BAK file, simply type *.BAK - which will then display all BAK files. If you CAN retrieve the BAK file, it will be because it was NOT backed up WITH the corruption, and therefore will NOT be as recent as the WK4 file. However, it probably will be more recent than your other WK4 backup files.
Here's hoping this will prove successful.
Regards, ...Dale Watson dwatson@bsi.gov.mb.ca