problems to destroy a cursor

[-= JB =-]

I am using Revolution 2.9.0 and Valentina 3.5.1

In the Reference PDF is states the below concerning a cursor from a  
SQL command.

Note: When finished with a cursor, you must assign it the value nil  
to destroy it and free
memory.

Does this mean I need to somehow nil the cursor before I destroy it  
or are they trying
to say I need assign it a value of nil by destroying it which will  
free the memory.

I am able to get a cursor ref number and the following seems to  
destroy it but I am
not able to check and see if it has been destroyed.

get VCursor_Destructor(curs)

How can I check to see if the cursor has been destroyed and can
it cause problems to destroy a cursor that was already destroyed.

Also the reference pdf mentions another way to destroy a cursor
is to use the following:

get Cursor_Destroy(curs)

When I use the above to destroy the cursor I get an error message  
when the
script executes.

thanks,
-=>JB<=-