{
{   The purpose  of this routine is to obtain the active set table entry given
{ the active set table index to the desired entry.  The entry may be  a  valid
{ or an unused entry.
{
{       STP$OBTAIN_AST_ENTRY (AST_INDEX, AST_ENTRY, STATUS)
{
{ AST_INDEX:  (input)  This  parameter specifies the index into the active set
{       table.
{
{ AST_ENTRY: (output) This parameter returns a copy of the  active  set  table
{       entry.
{
{ STATUS: (output) This parameter returns the request status.
{
{       CONDITIONS: ste$set_not_active
{
{       IDENTIFIER: stc$set_management_id
{
