{
{   The purpose of this request is to invalidate an ACTIVE segment in the SDT.
{   The backing store file is destroyed and returned if one is assigned.
{
{       MMP$TERMINATE_SHADOWING_R1 (SEGMENT_NUMBER, STATUS);
{
{ SEGMENT_NUMBER: (input) This parameter specifies the SEGMENT NUMBER
{       to be invalidated.
{
{ STATUS: (output) This parameter specifies the request status returned.
{

