Used after a GET that returned an object identifier to indicate no longer interested in the object and can release that identifier. The application response is:
OBJECT NOT FOUND
The debugger must release object identifiers after it uses them to query subobjects, else it will lock a lot of memory on an application and can alter the behavior of the application. You are not allowed to have any pending locks when you issue a GO or STEP command, and if you do that command will be DENIED with a message to this effect.