>I Have a temporal table for a control treeview, that is continually zap , now I want to make a change to the structure of that table and I recibe the error ‘File ‘mytable ' does not exist ' and crash VFP with the Fatal Error Exception C000005, and I lose the table.
>What can be happening, because I can open it and see it but I cannot modify the structure
>
>Thanks...

If by temporal table, you mean cursor, you cannot edit the structure. What are you trying to do? Why are you wanting to edit the structure?