Release all public and private variables
CLEAR MEMORY deletes both public and private memory variables from the memory variable table. It operates in contrast to RELEASE ALL, which does not actually delete public and private memory variables but assigns NIL to those whose scope is the current procedure. CLEAR MEMORY is the only way to delete all public memory variables from current memory. Local and static variables, however, are unaffected by CLEAR MEMORY.
For more information on variables, refer to the Variables section of the “Basic Concepts” chapter.