Sounds like a corrupted DBF header. You probably need a table repair utility such as dSalvage, etc...
> I've just had a phone call from my client. There network has fallen over. they've got it fixed now, but it seems to have taken out a dbf. and now we're getting error 15 - Not a table/dbf.
>Does any one know how to sort this out/ get at the info/ or just have any helpful ideas.
"It hit an iceberg and it sank. Get over it."
Robert Ballard, dicoverer of the Titanic wreckage.