{
{   The purpose of this request is to return the number of
{ tape units on the system.
{
{       DMP$FETCH_TAPE_UNIT_COUNT (TAPE_UNIT_COUNT, STATUS)
{
{ TAPE_UNIT_COUNT: (output)  This parameter specifies the
{       number of tape units on the system.
{
{ STATUS: (output) This parameter specifies the request status.
