I get an error message when I try to run a form. I only get the error message if I go to other machines(not the developer). The error is as follows

Error Loading file-loading form or the data environment-record number 6. The table file invoice1.dbf has moved. Please validate database data1 and try again.

I haven't moved the tabel, and I validated the database sucessfully. what do they mean by record number 6. All comment would be greatly appreciated. TIA.