{
{   The purpose  of  this  procedure is to create a device file for the volume
{ set table.  The device file is opened and only the version number
{ is initialized.
{
{       STP$CREATE_VST (VSN, VST_SFID, VST_SEGMENT_POINTER, STATUS)
{
{ VSN: (input) This parameter specifies the volume on which the device file is
{       to  be  created  on.   There must NOT already be a volume set table on
{       this volume.
{
{ VST_SFID: (output) This parameter returns the system file identifier for the
{       newly  created  device  file.  This can then be used to open or return
{       the volume set table.
{
{ VST_SEGMENT_POINTER: (output) This parameter returns the segment pointer
{       to the volume set table.  This may be used to directly reference
{       the volume set table.
{
{ STATUS: (output) This parameter returns the request status.
{
{
{       CONDITIONS: ste$push_failed
{                   ste$open_error
{                   OTHERS FROM DEVICE MANAGEMENT
{
{       IDENTIFIER: stc$set_management_id
{
