Hi Sergey,
I get this message even if it is the first statement that I enter in the command window in a new VFP session.

Barry.

>You have to close DBC opened shared in order to open it exclusively.
>
>>When I try to open a database and edit the referential integrity I am warned that the database is not opened exclusively even when I use the following syntax to open it:
>>

OPEN DATABASE sop.dbc EXCLUSIVE

>>
>>If I try

VALIDATE RECOVER

I am again warned that the dbc is not opened exclusively.
>>
>>Anyone got any suggestions as to what I am doing wrong?
>>
>>Thanks
>>Barry Sutton