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