This could be one of two things:1. The database has been corrupted beyond fixup’s ability to repair it, or even recognize it as a database.
Someone replaced the database file with another file saved with the .nsf extension.
The .nsf extension does not make a database out of any file. I once had a user who had replaced her id file with a .zip file with the name user.id. Natuarally, the user could not log on to Notes after that.
If Notes/Domino can not open or repair the file, then it is time to bring out the backup copy and restore from there. You do have a backup copy, don’t you?