Error -70 Error 90621

Getting an error when opening invoices and closing ASW. Error # -70 Error # 90621 Reading File file4readError C:\CARS\ASBILLHDR2.FPT Or C:\CARS\ASOPTONS.FPT I renamed the following files and then transferred what was on my computer to reps computer: ASBILLHDR2.FPT ASBILLHDR2.DBF Or ASOPTONS.cdx ASOPTONS.dbf ASOPTONS.fpt