>I use ALTER TABLE to change tables structure in my application but I don't want VFP to create BAK files of these tables.
>
>I try SET SAFETY OFF but it didn't works.
>
>TIA

Unfortunately, there is no way to stop this. FoxPro always creates these files when modifying the structure. You have to explicitely delete the files. You will also have to delete the .tbk file which is the memo file if your table has a memo field.

Mace