>This morning client looks up customer in 13000+ database. Next runs application that packs same file.
>Result: All records are gone. Doing "dir" command on file says file is 27MB. But no records are present with
>browse from command box. Only other file that is packed during this application is fine.
>
>Has anyone ever heard of something like this happening?
>Brad

A size of empty table is measured in KB not MB. Something is definitely wrong. Most likely table got corrupted. You may try to fix it using one of available table repair tools or just restore from the latest backup if possible.