{
{   This procedure returns the set ordinal and name of the master volume
{ for a set that is currently active.
{
{       STP$GET_SETS_ORDINAL (SET_NAME, SET_ORDINAL, MASTER_VOL, STATUS)
{
{ SET_NAME: (input) This parameter specifies the set name.
{
{ SET_ORDINAL: (output) This parameter returns the set ordinal of
{       the given set.
{
{ MASTER_VOL: (output) This parameter returns the name of the master volume
{       of the set.
{
{ STATUS: (output) This parameter returns the request status.
{
{        CONDITIONS: ste$set_not_active
{
{        IDENTIFIER: stc$set_management_id
{
