Killing Structures with NIL as first subscript.

If you have a magic structure with a primary subscript of nil; you do not want to perform a kill like this: K(:[""]) . Kill of nil will kill all data under the : prefix. Even tho your structure has a value at :["",123], you cannot kill on nil as that kills the entire structure. Performing a physical next on the structure would get it done: ""^Q,""^QQ,DO{>:[Q,QQ]^QQ ""^:[Q,QQ]}.