*NOTHING
Setting a reference type variable - that is, an object variable to *Nothing means that the variable is not associated with any object. For example:
Dclfld MyObject Type( *Object ) New() // instances MyObject
MyObject = *Nothing // No object currently referred to.
When you assign * Nothing to an object variable, it no longer refers to any object instance. If the variable had previously referred to an instance, setting it to * Nothing does not terminate the instance itself. The instance is terminated and the memory and system resources associated with it are released, only after the garbage collector detects there are no active references remaining.