I have an issue where I need the dbused() function to return .f., indicating that the currently set to database is closed. Using the code below, I cannot achieve this. Using a "close databases all" is not a desirable option here.

&& the database "dbcname" is already opened
set data to dbcname
close tables
close indexes
close format
close database

If I look at dbused('dbcname') now, it returns .t. Is there something else I can do to get this databse to close? Is there a way to inspect any references to the database that are preventing it from closing?