Hi Sergey,

>See SET TABLEVALIDATE command.

I issued:

close databases all
SET TABLEVALIDATE to 0
USE h:\pointer\database\tasksched\task_lockfile.dbf SHARED
close databases all
SET TABLEVALIDATE to 1
USE h:\pointer\database\tasksched\task_lockfile.dbf SHARED
close databases all
SET TABLEVALIDATE to 2
USE h:\pointer\database\tasksched\task_lockfile.dbf SHARED
close databases all
SET TABLEVALIDATE to 3
USE h:\pointer\database\tasksched\task_lockfile.dbf SHARED
close databases all

but nothing happenned. If the dbf table was corrupted it should appear some message?

I don't thing that table is corrupted, rather that there is an extrange fLock() behavior in VFP8.

Let me tell you a bit more and see you can give me further advice. That application was running ok till this morning (it was compiled in VFP 6) then I made a change in the appearance of the start screen and recompiled it again (now in VFP 8), since then it started to present the fLock() problem.

Fernando