Problem opening my EBP Payroll file

If I judge by the problem already discussed in this post: https://forums.commentcamarche.net/forum/affich-9619535-ebp-compta-pratic-perte-des-dossiers
A restoration might fix the problem..

The message seems to indicate a database issue... it would be good to check the health of your hard drive.... or to verify that files have not been deleted or moved..

BtrvErr12 must mean "Btrieve Error 12" which is an error message from the Btrieve file manager when it cannot find a file to open.